Current thoughts on GM OLM?

[UncleDave]

went by my 2002 silverado's OLM from 60k to 233K with zero issues. im going to shoot for 8k on HPL PCEO 5w-40.

So then you are moving off the OLM to a fixed mileage?

The GM OLM doest touch the oil, but assumes degradation and computes mileage remaining based on your habits and inputs against a given an API standard and specified grade.

It has no idea if you put in better or worse oil.

 

[BrendanC]

So then you are moving off the OLM to a fixed mileage?

The GM OLM doest touch the oil, but assumes degradation and computes mileage remaining based on your habits and inputs with the degradation curve tested against a given an API standard and specified grade.

It has no idea if you put in better or worse oil.

yes moving to a fixed mileage. will just reset the OLM whenever it comes up.

 

[CKN]

How many threads on this subject............................?

More than 10plus pages.....

 

[Jpc1623]

I have ‘20 Equinox w/ 1.5T, I’ve used PPPP, Royal Purple and Valvoline EP all in 0w20 flavor. I worked my way down the OLM from 24-18% had the oil tested by BS each time and each time they came back 8k miles or 5% left on OLM. Do I trust and like the OLM, yes will I go down to 5% only with boutique oil. I think 15-20% is reasonable considering how UOA came back.

 

[nickaluch]

I don't trust the OLM on the G6 beater since new but all my other GM vehicles I follow it no issues.