Hours vs. Mileage OCI

[turboseize]

Originally Posted By: vortex9
Originally Posted By: zorobabel
The best way would be to change oil at a certain number of gallons of gas used. This way you account for idling, cold starts, hard driving, freeway cruising... all factors basically, except time. I'm switching to this method.



+1 (easy when you keep a log book)


That's the way the (german) army does it. (Or at lest did, while I was serving, which is now quite some years ago.)

 

[BalticBob]

Would using regular or premium fuel make any difference to the oil quality for this method?

 

[KL31]

Originally Posted By: BalticBob
Would using regular or premium fuel make any difference to the oil quality for this method?


Most certainly for direct injection turbo engines. Better fuel with less sulfur mixing with the oil will help.

I think the hours in use is a simple effective way to measure. Definitely highway mileage is like adding to the odometer with least impact on the engine's life. You get more miles in far less time and you burn less fuel too, a trifecta right there.

Would you prefer an engine that has done 160,000ms in 3 years with almost all highway.

Or

Engine with 80,000kms in 6 years all city.

If you could be 100% certain, then you'd pick maybe the 3 year old car but almost no one does in reality.

 

[demarpaint]

Originally Posted By: Merkava_4
What you guys do with the oil if it was at:
- 2000 miles
- one year
- OLM @ 50%


Not exactly the same numbers but close enough after a year. In my situation I did a virtual oil change for warranty purposes, and I'm leaving it in the sump until it hits 5K miles. I have UOA data to back it up, and it will be fine.