+1 for Gary Allan
Do I Need To Change Filter Every 3000 Miles?
- Thread starter fairhaven
- Start date
- Status
Originally Posted By: Gary Allan
Quote:
I think Gary allen had once said, in a post i put in, he'd b a little concerened about combustion by product accumulation in the fitler media, with short trips.
What's everyone think?
Short trip usage. More % of time a fuel enrichment. More combustion byproducts. More moisture retention. Less time at the sweet spot of operation.
Taxi: Plenty of filter life. Less miles per gallon of fuel processed.
Long(er) trip usage: Lower % of time at fuel enrichment. Lower levels of combustion byproducts per mile. More time at the sweet spot of near zero insult.
Gary, I undertand your first and third examples, but the one about the taxi...I'm not getting. Could you elaborate for me?
Not challenging you, just need an explanation
Quote:
I think Gary allen had once said, in a post i put in, he'd b a little concerened about combustion by product accumulation in the fitler media, with short trips.
What's everyone think?
Short trip usage. More % of time a fuel enrichment. More combustion byproducts. More moisture retention. Less time at the sweet spot of operation.
Taxi: Plenty of filter life. Less miles per gallon of fuel processed.
Long(er) trip usage: Lower % of time at fuel enrichment. Lower levels of combustion byproducts per mile. More time at the sweet spot of near zero insult.
Gary, I undertand your first and third examples, but the one about the taxi...I'm not getting. Could you elaborate for me?
Not challenging you, just need an explanation
Two thoughts. One - a filter will tend to filter better as it is used to a certain point - that point might be several thousand miles into its use. This is true for a variety of filter types, on vehicles and not.
Two - think about the tiny amounts of wear that modern engines produce, as evidenced by UOA. If anything it seems to me that the amount of total wear volume over one or even a few manufacturer-recommended OCIs would not be enough to clog a filter.
My opinion is that recommended filter change intervals are probably on the conservative side and that changing any sooner would cause more, not less, contamination to find its way into the engine oil.
Two - think about the tiny amounts of wear that modern engines produce, as evidenced by UOA. If anything it seems to me that the amount of total wear volume over one or even a few manufacturer-recommended OCIs would not be enough to clog a filter.
My opinion is that recommended filter change intervals are probably on the conservative side and that changing any sooner would cause more, not less, contamination to find its way into the engine oil.
Why did Honda recommends changing filter every other oil change for most of its vehicles ?
No.
- Joined
- Sep 28, 2002
- Messages
- 39,798
Quote:
but the one about the taxi...I'm not getting. Could you elaborate for me?
Taxi service is deemed "severe". It's not that hard on engine/oil/filters. The engine sees far fewer cold starts and is in steady state the lion's share of the time ..at least a lot more than the two cold start and variable event duration daily driver.
They typically process far more fuel per mile than the daily drivers that they're compared to. That is, mileage is a poor way to measure fatigue rates on oil/filter (and many other things). I mean it works, but it gives you some impression of "abusive" ...and "brutal". Now in most vehicles (except apparently Crown Vic's - one of Ford's better ideas) it IS true for something like an automatic transmission that has a fatigue rate based on the number of shifts it makes per mile.
The taxi that's getting a 3k-6k OCI may very well be getting the equivalent of 10k-12k usage in vehicle using the same fuel on a once a day cold start cross country trip.
but the one about the taxi...I'm not getting. Could you elaborate for me?
Taxi service is deemed "severe". It's not that hard on engine/oil/filters. The engine sees far fewer cold starts and is in steady state the lion's share of the time ..at least a lot more than the two cold start and variable event duration daily driver.
They typically process far more fuel per mile than the daily drivers that they're compared to. That is, mileage is a poor way to measure fatigue rates on oil/filter (and many other things). I mean it works, but it gives you some impression of "abusive" ...and "brutal". Now in most vehicles (except apparently Crown Vic's - one of Ford's better ideas) it IS true for something like an automatic transmission that has a fatigue rate based on the number of shifts it makes per mile.
The taxi that's getting a 3k-6k OCI may very well be getting the equivalent of 10k-12k usage in vehicle using the same fuel on a once a day cold start cross country trip.
Originally Posted By: HTSS_TR
Why did Honda recommends changing filter every other oil change for most of its vehicles ?
Because even using the tiny filters on these engines, they'll still last longer than the automatic transmission. And, if you live in a rust-belt, the engine will last longer than the rest of the car.
Consider that fuel injection with Oxygen sensor and MAF air controls, smaller volume coolant systems, better PVC systems, etc., allow engines to run more efficiently than ever...it's the byproducts of incomplete combustion and the crud caused by excess water vapor that are the big enemies of oil filter longevity. Modern engines just don't have the filtration requirements of those in the past.
20,000 miles on a Honda filter is fine in my book, unless I put very few miles on the car per year, or, lived in the Arctic circle and didn't get the car fully warmed up on my drive from my Igloo to the Quickie Mart.
Why did Honda recommends changing filter every other oil change for most of its vehicles ?
Because even using the tiny filters on these engines, they'll still last longer than the automatic transmission. And, if you live in a rust-belt, the engine will last longer than the rest of the car.
Consider that fuel injection with Oxygen sensor and MAF air controls, smaller volume coolant systems, better PVC systems, etc., allow engines to run more efficiently than ever...it's the byproducts of incomplete combustion and the crud caused by excess water vapor that are the big enemies of oil filter longevity. Modern engines just don't have the filtration requirements of those in the past.
20,000 miles on a Honda filter is fine in my book, unless I put very few miles on the car per year, or, lived in the Arctic circle and didn't get the car fully warmed up on my drive from my Igloo to the Quickie Mart.
"Yeah, that's why I like to change oil hot, the unfiltered particles are more likely to be in suspension than settled out"
Settled out where? If they indeed settle out of the cold oil (which I doubt) they are still at worst in the bottom of the oil pan still in oil. If they are so small that they will move with the oil as it is drained. If the particles are that large that they do not move then your filter isn't working and you have bigger problems than the difference between hot and cold oil changes.
Settled out where? If they indeed settle out of the cold oil (which I doubt) they are still at worst in the bottom of the oil pan still in oil. If they are so small that they will move with the oil as it is drained. If the particles are that large that they do not move then your filter isn't working and you have bigger problems than the difference between hot and cold oil changes.
Originally Posted By: fairhaven
I'm running Mobil 1 in my 2007 GMC Sierra 6.0L crew cab. I've gone almost 4500 miles since my last oil change. The OLM shows 38% left. I read somewhere that you should change the filter every 3000 miles regardless of the OCI. Is this true?
Not true. I run OE filers 5000-5500 every time. Next time I'm going to cut one open and see what it looks like inside.
I'm running Mobil 1 in my 2007 GMC Sierra 6.0L crew cab. I've gone almost 4500 miles since my last oil change. The OLM shows 38% left. I read somewhere that you should change the filter every 3000 miles regardless of the OCI. Is this true?
Not true. I run OE filers 5000-5500 every time. Next time I'm going to cut one open and see what it looks like inside.
- Status
Similar threads
- Locked
