OCI of 7,500 on dino...

[Doc8404]

as per the manufacturer in 1992.

I see so many that say they wouldn't run a dino past 5k...but if the manufacturer recommended it 15 years ago, with all the advances in oil, why can't a dino last that long now?

also, it says that 5W-20 isn't recommended for sustained high speed car operation.

what is considered high speed?
I run 5W-30, but was thinking about 5w-20 since my other two run it.

thanks in advance.

 

[glenncof]

My manufacture spec'd 15K OCI in 1985. I did 7.5K OCI since it had 12 qt capacity.

After 120K miles I switched to 3K OCI. Now at 176K original miles I am still paying for my sins...

I suppose most mfg plan on median life of around 100-130K. Isn't that "Good Enought" ? Not for me.

 

[Brogy]

Sustained high speed would be (I think) running it at 60mph or above for more than 10 minutes.

I wouldnt trust the havoline in my car right now to go 7500, nothing against texaco, just don't think my engine would handle it (1994 car). My car isnt as efficient as when it was new, and I know the oil gets more contaminated than when it was new, so shorter OCIs is the best for me. As soon as im done with autorx, im going to be running my car on 4k OCIs with havoline and AAP filters. I think any car could handle that OCI with ease, new or old.

 

[nooil]

Quote:

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as per the manufacturer in 1992.

I see so many that say they wouldn't run a dino past 5k...but if the manufacturer recommended it 15 years ago, with all the advances in oil, why can't a dino last that long now?

also, it says that 5W-20 isn't recommended for sustained high speed car operation.

what is considered high speed?
I run 5W-30, but was thinking about 5w-20 since my other two run it.

thanks in advance.

---

I think you will find that the 5w-20 of today is better quality than back in 1992 and would hold up for higher speeds. Just like 5-30 used to be only for temps of under 60 degrees F and now it can be used for higher temps. I remember back in the 60's when alot of 10w-30's weren't all that great either. Just my

 

[Doc8404]

hmmmm, maybe all my vehicles will be running 5k OCI's on MC 5W-20.

 

[blackdiamond]

I believe that 5w-20 oils are currently being recommended in cars to reduce the mpg to make the manufacture look better. The service manager where I purchased my Mazda told me, just this week, that he wouldn't run 5w-20 even though it was the standard at the dealership; he said it was used for improved mileage ignoring the added engine wear. He didn't seem to mind that my wife insisted, on my behalf, that the 5w-20 be changed to 5w-30 per the owners manual.

 

[LouDawg]

Quote:

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I believe that 5w-20 oils are currently being recommended in cars to reduce the mpg to make the manufacture look better. The service manager where I purchased my Mazda told me, just this week, that he wouldn't run 5w-20 even though it was the standard at the dealership; he said it was used for improved mileage ignoring the added engine wear. He didn't seem to mind that my wife insisted, on my behalf, that the 5w-20 be changed to 5w-30 per the owners manual.

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Proving, once again, why so many of us do not trust stealership service people. Ask him to provide you evidence of this "added engine wear".

 

[Ugly3]

Oh those of faint heart! I am running Mobil 1 5w20 in my 1998 Chrysler 3800 V6 with almost 200,000 miles on it. So far I have gone 4,000 highway miles with no consumption, no noise, no nothing. Fear not!

 

[Seth]

Quote:

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Oh those of faint heart! I am running Mobil 1 5w20 in my 1998 Chrysler 3800 V6 with almost 200,000 miles on it. So far I have gone 4,000 highway miles with no consumption, no noise, no nothing. Fear not!

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Mobil1 is synthetic.. and costs 3 times that of dino. Part of that extra cost is to make sure that it works well. Remaining goes to Exxon-Mobil's coffers (38 billion profit in last quarter of 06 - thats almost 3 billion per month

)

 

[LouDawg]

Quote:

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Quote:

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Oh those of faint heart! I am running Mobil 1 5w20 in my 1998 Chrysler 3800 V6 with almost 200,000 miles on it. So far I have gone 4,000 highway miles with no consumption, no noise, no nothing. Fear not!

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Mobil1 is synthetic.. and costs 3 times that of dino. Part of that extra cost is to make sure that it works well. Remaining goes to Exxon-Mobil's coffers (38 billion profit in last quarter of 06 - thats almost 3 billion per month

)

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I'm pretty sure that the $38 billion was for the entire year...not just the 4th quarter. But it's still a lot of dough.

 

[Seth]

You are right

Last month, Exxon Mobil posted the largest annual profit by a U.S. company - $39.5-billion - although its earnings for the last quarter of 2006 declined 4 percent to $10.25-billion

 

[mitchcoyote]

Sure are a lot of Socialist here on Bitog. I believe in trickle =down economics and those billions of dollars will trickle down in the long run...

 

[Titan]

Quote:

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Sustained high speed would be (I think) running it at 60mph or above for more than 10 minutes.

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Sustained high speed would be (I think) running it at 100 mph or above for more than 20 minutes.

I did just that on my car, and the subsequent UOA was just as good as ever...IOW, doing so had no ill effects picked up by a UOA.

 

[TeeDub]

One issue is that engine lubrication requirements are becoming much more stringent. The holy grail for engine output used to be 1 Hp/cubic inch and now even some grocery getters exceed that. Combine that with smaller sumps and more aerodynamic body styles that reduce convective cooling from the engine block and oil pan and you have elevated oil temps in many newly designed vehicles.

The various multivalve arrangements, turbochargers and high rpm ranges of many of todays engines - particularly the 4/6 cylinder models - also tends to break down the oil very rapidly.

Newer oil specs are being released at an ever increasing rate in order to keep up with engine demands and the newer oils must also have lower levels of additives.

TD

 

[LouDawg]

Quote:

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Sure are a lot of Socialist here on Bitog. I believe in trickle =down economics and those billions of dollars will trickle down in the long run...

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I'm the furthest thing from a Socialist you'll ever see, Mitch. I have no problem with anyone or any company making as much money as possible as long as they do it within the limits of the law, and they are ethical in their dealings.

 

[Doc8404]

Quote:

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One issue is that engine lubrication requirements are becoming much more stringent. The holy grail for engine output used to be 1 Hp/cubic inch and now even some grocery getters exceed that. Combine that with smaller sumps and more aerodynamic body styles that reduce convective cooling from the engine block and oil pan and you have elevated oil temps in many newly designed vehicles.

The various multivalve arrangements, turbochargers and high rpm ranges of many of todays engines - particularly the 4/6 cylinder models - also tends to break down the oil very rapidly.

Newer oil specs are being released at an ever increasing rate in order to keep up with engine demands and the newer oils must also have lower levels of additives.

TD

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soooooooo, an SM rated blend should be fine with 7,500 mile OCI's???

considering they recommended it for dino back in 1992.

 

[Hootbro]

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soooooooo, an SM rated blend should be fine with 7,500 mile OCI's???

considering they recommended it for dino back in 1992.

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If 90% of my driving is freeway driving, then I would have no heartache doing that.

Hootbro

 

[ThirdeYe]

My car's manual recommended 6 mo./7,500 miles too. I've always had it done at 3 mo./3,000 with dino but that's just me being over cautious most likely.

 

[Bill in Utah]

Well,

Lets put in some FACTS.

Here is a UOA with TBN of Castrol GTX (SM) 5w-30 that was run in a 4 valve per cyl, VVC, timing chain 4 cyl engine that sees 3000 rpm most of the time for 5800 miles.

Also, this period of OCI it was durning the winter and below freezing most of the time.

Toyota 1ZZFE UOA 5.8k miles

So, with a TBN of 4.4 (which tells us that we could go futher) I think a OCI of 7500 miles would be possible.

This is with conventional oil.

And Mitch, some of BITOG are not oil salesman and also do not need to WASTE $$ for things that are not needed.

At the price I paid for this oil, You would have to run Syn oil (@ $4 a quart) for 32,000 miles to be even..

I'd love to see the UOA when your done. Please post it with your next oil change..

Even with the UOA above, I am going to stay around 5k for my oil changes. Why?

Because my oil changes incl filter cost under $5. For about the same price as a single quart of syn, I can replace all of the oil (which is STILL protecting my engine with ease) and place a new filter in place.

For me, a little piece of mind.

It is interesting a lot of folks here inject their opinion but have never posted their UOAs here.. Or never done UOAs with both conventional and syn to prove what they are posting..

Wonder what is up with that?

Bill

 

[The Critic]

I changed the oil every 7500 or so in the Saturn and after almost 99k of extremely short trips, consumption is minimal and the internals look clean. What's the problem?