I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
OEM oil filters
- Thread starter fauxchemist
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Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look at an EP one if extending your OCI.
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look at an EP one if extending your OCI.
Last edited:
Originally Posted By: skyship
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
Originally Posted By: Clevy
Originally Posted By: skyship
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
Maybe because Europe covers a rather large area, with many extremes of climate.
Spain and Portugal can get as hot as North Africa and then you have places like Sweden which also have very cold winters.
Also Europe got away from the 3k or 3month OCI mentality several years ago.
And the one oil filter for two OCI's has been going on in Europe for a few years now.
Australia also has very variable temperatures also but they also have to take into consideration the dust away from large Towns and Cities. So I have noted they have shorter OCI's but in comparison to similar vehicles in Europe they spec the same quality oil with shorter OCI.
Here is a statement I heard many years ago.
A closed mind is a wasted mind.
If you shout down any opinion except a North American one you are only affecting yourself.
After all I think you will find a lot of things in the US have come from Europe.
Penicillin, TV, Banking system, Telephone, large percentage of the initial American population.
And don't forget that there is indeed a lot of engineering expertise in Europe.
Some examples would be the Harrier Jump Jet and the only Supersonic Passenger Plane, Concorde.
Lets also not forget what the UK came up with in the early sixties on a very limited budget, the rear suspension was designed in a few days, the Jaguar E Type.
Not saying everything from Europe applies to North America, but your blinkered, blanket viewpoint is not beneficial to the forum or the OP.
The OP should be allowed to look at all information available to help him as it will all help in some way.
As car as the OP goes I see no reason for changing the oil filter but leaving in the oil in situ and I suspect he would have for the same results with just the one filter.
Europe uses much longer OCI than NA, has done for many years but unless the car is used around town, in stop start traffic and short trips and a good synthetic or even semi synth is used then I don't see any issue in running 15k with one filter.
The latest Mercedes Vito London Taxi is Euro 5 emissions with a DPF and autobox, it has the 2.2 Merc diesel lump and runs variable service intervals that seem to run mostly to 24k or there about a.
That is with one filter and one fill of Full Synth oil. And is severe service use aswell!
And the concept of oil filter efficiency as stated on bitog is an alien concept for my European sensibilities, do I say it has nothing to do with Europe or do I consider the opinions and evidence and conclude it is entirely logical.
After reading bitog I tend to leave air filters in place for at least a year with just a clean out every OCI.
How much money would I have wasted if I had looked at the information on bitog and ignored it as it was not written by somebody from Europe.
Originally Posted By: skyship
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
Maybe because Europe covers a rather large area, with many extremes of climate.
Spain and Portugal can get as hot as North Africa and then you have places like Sweden which also have very cold winters.
Also Europe got away from the 3k or 3month OCI mentality several years ago.
And the one oil filter for two OCI's has been going on in Europe for a few years now.
Australia also has very variable temperatures also but they also have to take into consideration the dust away from large Towns and Cities. So I have noted they have shorter OCI's but in comparison to similar vehicles in Europe they spec the same quality oil with shorter OCI.
Here is a statement I heard many years ago.
A closed mind is a wasted mind.
If you shout down any opinion except a North American one you are only affecting yourself.
After all I think you will find a lot of things in the US have come from Europe.
Penicillin, TV, Banking system, Telephone, large percentage of the initial American population.
And don't forget that there is indeed a lot of engineering expertise in Europe.
Some examples would be the Harrier Jump Jet and the only Supersonic Passenger Plane, Concorde.
Lets also not forget what the UK came up with in the early sixties on a very limited budget, the rear suspension was designed in a few days, the Jaguar E Type.
Not saying everything from Europe applies to North America, but your blinkered, blanket viewpoint is not beneficial to the forum or the OP.
The OP should be allowed to look at all information available to help him as it will all help in some way.
As car as the OP goes I see no reason for changing the oil filter but leaving in the oil in situ and I suspect he would have for the same results with just the one filter.
Europe uses much longer OCI than NA, has done for many years but unless the car is used around town, in stop start traffic and short trips and a good synthetic or even semi synth is used then I don't see any issue in running 15k with one filter.
The latest Mercedes Vito London Taxi is Euro 5 emissions with a DPF and autobox, it has the 2.2 Merc diesel lump and runs variable service intervals that seem to run mostly to 24k or there about a.
That is with one filter and one fill of Full Synth oil. And is severe service use aswell!
And the concept of oil filter efficiency as stated on bitog is an alien concept for my European sensibilities, do I say it has nothing to do with Europe or do I consider the opinions and evidence and conclude it is entirely logical.
After reading bitog I tend to leave air filters in place for at least a year with just a clean out every OCI.
How much money would I have wasted if I had looked at the information on bitog and ignored it as it was not written by somebody from Europe.
Well said BigJL. Nevertheless, its hard for us N.Americans who have been schooled in short duration oil and filter changes to truly believe they can be extended like in Europe. I began running conventional oil/filter 5000 miles many years ago and eventually bought into the Amsoil concept of synthetic oil long before it was sold by any other company. I always ran it and later Mobil1 for 10,000 with a quality filter each change. Perhaps I could extend that but 10K sticks in my mind and is easy for me to remember. Having just bought a new car, after its well broken in I'll run some lab tests to see how the oil fares. Filters are harder to judge, but generally I use M1, Bosch extended, or Napa Gold.
What engine does your Jeep have?
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
The Mopar filters are good ones but they are in many ways a Puro Classic. Not advertised nor intended to be 15k filters, although I imagine it would be possible to get away with it in a clean engine.
You absolutely do not need to change them every 3k though, my suggestion would be to change it just once at 7,500 miles. Doing so would greatly reduce your filter swaps and also get maximum reasonable use out of your Mopars without pushing them to extremes.
You can also cut one open at 7,500 and see how it's faring in your engine, perhaps you'll decide 15k is doable. You can also switch to an extended life filter like an Ultra or D+ and run it the whole 15k without worry, you'd still save money over swapping out OEM's at 3k.
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
The Mopar filters are good ones but they are in many ways a Puro Classic. Not advertised nor intended to be 15k filters, although I imagine it would be possible to get away with it in a clean engine.
You absolutely do not need to change them every 3k though, my suggestion would be to change it just once at 7,500 miles. Doing so would greatly reduce your filter swaps and also get maximum reasonable use out of your Mopars without pushing them to extremes.
You can also cut one open at 7,500 and see how it's faring in your engine, perhaps you'll decide 15k is doable. You can also switch to an extended life filter like an Ultra or D+ and run it the whole 15k without worry, you'd still save money over swapping out OEM's at 3k.
I don't think you will have any issues running 10k miles on one filter. What oil and how many miles on engine currently?
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
IMO if you want to do 15k OFI i would stick with one of these..
NAPA Platnum
Purolator synthetic
Yellow P1
Bosch D+
RP
EAO
M1
Just to name a few.
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
IMO if you want to do 15k OFI i would stick with one of these..
NAPA Platnum
Purolator synthetic
Yellow P1
Bosch D+
RP
EAO
M1
Just to name a few.
When you say go 10k what exactly do you mean?
Without plugging for 10k? I would say yes. A lower efficiency filter is catching less deposits, so it will take longer to plug up. A lower efficiency filter will eventually get more efficient as the media pores clog up with deposits over time. With that efficiency goes oil flow. Squeezing through a tighter space slows oil flow down.
Clean looking oil for 10k? Swap a lower efficiency filter often, definitely no for the reasons stated above. Higher efficiency = cleaner (looking) oil, but the media must be capable of catching more deposits or the risks of plugging would be greater on extended intervals.
In general I question using high efficiency filters for extended intervals. For the reasons stated. Have an old car so I'm finding that out right now. But I know the engine is very clean. If I didn't know the engine's condition would never try it.
My opinion right now until verified is choose the dirty looking 10k oil with a lower efficiency filter. But I base it on a couple of real experiences. A lady I know has not changed her oil in 4 years. Only adds. Approx 30k since last oil/filter change. I'm afraid to touch the car at this point. Dodge intrepid, Mopar filter. I had a plugged/failed filter last year. High(er) efficiency.
Without plugging for 10k? I would say yes. A lower efficiency filter is catching less deposits, so it will take longer to plug up. A lower efficiency filter will eventually get more efficient as the media pores clog up with deposits over time. With that efficiency goes oil flow. Squeezing through a tighter space slows oil flow down.
Clean looking oil for 10k? Swap a lower efficiency filter often, definitely no for the reasons stated above. Higher efficiency = cleaner (looking) oil, but the media must be capable of catching more deposits or the risks of plugging would be greater on extended intervals.
In general I question using high efficiency filters for extended intervals. For the reasons stated. Have an old car so I'm finding that out right now. But I know the engine is very clean. If I didn't know the engine's condition would never try it.
My opinion right now until verified is choose the dirty looking 10k oil with a lower efficiency filter. But I base it on a couple of real experiences. A lady I know has not changed her oil in 4 years. Only adds. Approx 30k since last oil/filter change. I'm afraid to touch the car at this point. Dodge intrepid, Mopar filter. I had a plugged/failed filter last year. High(er) efficiency.
Cut open a 3K filter (you must have hundreds!) and then a 5K or 7.5K one...
Do you really think you will see any difference in a normal (non-sludged) engine?
IMHO 5 filter changes in 15K miles is overkill. However, 400,000 miles is nothing to be sneezed at! Must have been a while since your last car payment, eh?
Cheers!
Do you really think you will see any difference in a normal (non-sludged) engine?
IMHO 5 filter changes in 15K miles is overkill. However, 400,000 miles is nothing to be sneezed at! Must have been a while since your last car payment, eh?
Cheers!
Thanks for the sound advice Bigjl. So Im assuming 50%city 50% highway which about what I drive and yes I do use synthetics, I can just change my oil filter at the end of my 15,000OCI?
I cut my filters open and hold the media up to a light. Any time I have run long OCIs of say 7000 plus miles, I will see no light through the media. Does that mean it is plugged? I don't know. If I do another 10,000 mile OCI (and my UOA says not to) I would spin a new filter halfway out.
Pick a filter that uses silicone rubber antidrain back valve and gasket, not nitrile rubber. The silicone rubber will stand up to the heat for that long duration much better.
Originally Posted By: Clevy
Originally Posted By: skyship
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
The UK and German oil finder sites for the major brand oil companies like Castrol or Mobil will give you the correct information specific to US cars in addition to EU ones without quoting new back speced oil grades. So what you get is a far less biased answer. Those answers will quote the correct max OCI and oil information if there is a difference due to the silly CAFE game that encourages the use of light oils and shorter OCI's for some engine types.
It's also much easier to discover which oils are true full synthetics rather than HC synthetics if you check the English version of the German site.
Originally Posted By: skyship
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
The UK and German oil finder sites for the major brand oil companies like Castrol or Mobil will give you the correct information specific to US cars in addition to EU ones without quoting new back speced oil grades. So what you get is a far less biased answer. Those answers will quote the correct max OCI and oil information if there is a difference due to the silly CAFE game that encourages the use of light oils and shorter OCI's for some engine types.
It's also much easier to discover which oils are true full synthetics rather than HC synthetics if you check the English version of the German site.
Last edited:
Originally Posted By: skyship
Originally Posted By: Clevy
Originally Posted By: skyship
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
The UK and German oil finder sites for the major brand oil companies like Castrol or Mobil will give you the correct information specific to US cars in addition to EU ones without quoting new back speced oil grades. So what you get is a far less biased answer. Those answers will quote the correct max OCI and oil information if there is a difference due to the silly CAFE game that encourages the use of light oils and shorter OCI's for some engine types.
What on earth does oil grade have to do with filter change interval (or oil change interval for that matter?). Answer: nothing.
Originally Posted By: Clevy
Originally Posted By: skyship
Originally Posted By: fauxchemist
I use a oem Mopar oil filter in my Jeep Grand Cherokee. Can these oil filters go 10,000 miles or do I need to change at 5,0000 miles? I have managed to put almost 400,000 miles on my Jeep doing 15,000 miles OCI. I have always changed oil filter every 3,000 miles.I really would like to not change filter at all during OCI. Make oil in 15,000 miles is 2.5 quarts.
Check the Castrol or Liqui Moly oil finder guides in the UK or Germany as they list the OCI's. I would be very surprised if it says 3K for oil filter changes.
The Mobil site will also have more info on oil filters as you might want to look
at an EP one if extending your OCI.
He is in Arizona. What good is a European recommendation in a north American application.
Op. Oil filters become more efficient as they get miles on. I'm doing 10k oil changes and changing the filter with the oil. Most,if not all oil filters can go 10k without negative effects.
The UK and German oil finder sites for the major brand oil companies like Castrol or Mobil will give you the correct information specific to US cars in addition to EU ones without quoting new back speced oil grades. So what you get is a far less biased answer. Those answers will quote the correct max OCI and oil information if there is a difference due to the silly CAFE game that encourages the use of light oils and shorter OCI's for some engine types.
What on earth does oil grade have to do with filter change interval (or oil change interval for that matter?). Answer: nothing.
What on earth does oil grade have to do with filter change interval (or oil change interval for that matter?). Answer: nothing.
[/quote]
Using a different oil grade makes almost no difference to how long the filter will last, but the oil finder sites only publish one OCI / OFI figure and as that figure is often a shorter than normal one in the US, the easiest way to check if the filter is good for a longer OCI is to look at the oil company web site in the UK or Germany. Some oil filter companies like Mobil do publish info, but as no one likes to go beyond a recommended filter change interval the oil finder guides are very useful, if the filter company won't comment.
Also Castrol has stopped making OCI recommendations for some cars sold in the US for legal reasons on their US site. I just looked up a 2012 2.0 Ford Focus with a Duratech engine and the US site lists several 5/20 oils, but makes no comment about the OCI, but if you then check Castrol in the UK, their oil finder just lists Magnetec 5/30 and a 12.5K mile normal service OCI. Liqui Moly have a specific tab for US cars and again they only list 5/30 oils. Very few engineers or engine oil companies outside the US are being fooled by what the US dealers and car manufacters are doing playing the light oil and short OCI game.
Some 0/20's are not so bad as they stay in grade longer, but the cheaper 5/20's are more suited to use in an Iffy lube along with their 3K next service stickers.
[/quote]
Using a different oil grade makes almost no difference to how long the filter will last, but the oil finder sites only publish one OCI / OFI figure and as that figure is often a shorter than normal one in the US, the easiest way to check if the filter is good for a longer OCI is to look at the oil company web site in the UK or Germany. Some oil filter companies like Mobil do publish info, but as no one likes to go beyond a recommended filter change interval the oil finder guides are very useful, if the filter company won't comment.
Also Castrol has stopped making OCI recommendations for some cars sold in the US for legal reasons on their US site. I just looked up a 2012 2.0 Ford Focus with a Duratech engine and the US site lists several 5/20 oils, but makes no comment about the OCI, but if you then check Castrol in the UK, their oil finder just lists Magnetec 5/30 and a 12.5K mile normal service OCI. Liqui Moly have a specific tab for US cars and again they only list 5/30 oils. Very few engineers or engine oil companies outside the US are being fooled by what the US dealers and car manufacters are doing playing the light oil and short OCI game.
Some 0/20's are not so bad as they stay in grade longer, but the cheaper 5/20's are more suited to use in an Iffy lube along with their 3K next service stickers.
Last edited:
Originally Posted By: skyship
Some 0/20's are not so bad as they stay in grade longer, but the cheaper 5/20's are more suited to use in an Iffy lube along with their 3K next service stickers.
The GF-5/SN requirements are fairly stringent for robustness/drain intervals. This OEM's have pushed hard for this, since "conventional" oils are often pushed to 10K and beyond. The proof is in the UOA's which are on this site. Unless there are some extreme operating conditions or a difficult engine (such as a DI engine w/a ton of fuel dilution), even house-brankd conventional oils have proven suitable for *reasonably* long drains.
You continue to make these factually inaccurate claims about "thin oils and short OCI's". OEM's do not recommend 3K OCI's, and viscosity and drain interval little to no relationship.
Some 0/20's are not so bad as they stay in grade longer, but the cheaper 5/20's are more suited to use in an Iffy lube along with their 3K next service stickers.
The GF-5/SN requirements are fairly stringent for robustness/drain intervals. This OEM's have pushed hard for this, since "conventional" oils are often pushed to 10K and beyond. The proof is in the UOA's which are on this site. Unless there are some extreme operating conditions or a difficult engine (such as a DI engine w/a ton of fuel dilution), even house-brankd conventional oils have proven suitable for *reasonably* long drains.
You continue to make these factually inaccurate claims about "thin oils and short OCI's". OEM's do not recommend 3K OCI's, and viscosity and drain interval little to no relationship.
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