10,000 mile (16,000 km) oci

[railball]

To borrow a reply from someone else:Keep in mind people if you can keep oxidation from occuring you can run your oil much longer.

Oxidation brings on the carbon and varnish. Oil will degrade, but not nearly as fast if you keep it from oxidizing.

I advise many to use lube control in their oil to keep oxidation from occuring.

 

[Pablo]

I only used LC once and it bought me nothing. Limited sample, not a believer. I followed the directions to the T.

Again to repeat: FP has worked like a charm, multiple times.

 

[medic]

quote:

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Originally posted by tmus2122:
The oil still carries dirt and gas no matter how good the oil, the dirt could still be hurting the engine. Why would any body do this.

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This is more common that you may think - look around here a bit more and see what you can learn. There is a wealth of information to be had from this board alone.

GM has a normal service OCI of up to 15,000 miles on the Trailblazer / Envoy with the 4.2L I6 engine. Why are 10k OCI's so hard to imagine?

Anyway, to answer the original question:

I used to in my '97 Ford F150 (4.6L) when I was driving 30k or more mile per year. Currently the odometer reads 137k miles. I hit 11k with one OCI and the UOA proved I could've gone much longer.

My dad does it with his VW Passat TDI currently at about 140k miles (VW specs 10k mile OCI's) and his 2001 Ford Focus which is currently around 90k total miles.

 

[springs]

quote:Originally posted by tmus2122:
The oil still carries dirt and gas no matter how good the oil, the dirt could still be hurting the engine. Why would any body do this. [Duh!]

Why would you not if you could get results like this?

quote: 1986 SAAB 900S 16V -- 300+k miles, mostly Mobil DC 10w30

Bear in mind, this is DINO!


Matt_S makes a very good point about Mobil DC being a conventional oil. This seems to confirm the Consumer Reports' oil test findings that today's conventional oils are excellent and should be good for at least 7,500 mile oil changes. Apparently, most of today's engines really don't need expensive synthetic oils.

 

[TomJones76]

quote:

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Originally posted by tmus2122:
The oil still carries dirt and gas no matter how good the oil, the dirt could still be hurting the engine. Why would any body do this.

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The only "dirt" in your motor is stuff that got past the filter.
Check out 3MP's 13,000 mile run.
http://neptune.spacebears.com/cars/stories/oil-life.html
At 3,000 miles, his sillicon (dirt) was 9 PPM. At 13,000 miles, it was 11.
I don't think going from 9 PPM to 11 PPM is hurting anything.
Gas contamination can be an issue if you do tons of idling, but you'd be surprised how little of a problem that is with modern cars with EFI, even with substantial city driving.

 

[1999nick]

quote:

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Originally posted by tmus2122:
The oil still carries dirt and gas no matter how good the oil, the dirt could still be hurting the engine. Why would any body do this.

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Most engines have oil filters for the dirt, and engines last 200,000 to 300,000 miles like this.