I am well aware of how the GM OLM works and I am also aware of the fact that it doesn't know the difference between synthetic and conventional.
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ok...sorry![]()

Just didn't want you to go all Oil Nazi on me

I run the XL, and I do more frequent changes because I feel better, and frankly I enjoy maintaining my vehicles.
I was the 3000 mile guy, then the 5000 mile guy, and now I let the OLM tell me when to do it while running the XL.
I have had as many as 8000 miles before it went to 1%, and as few as 3000, like this last time. The algorithm adjusts for so many factors.
I like the program you are on.
I carry out many extended interval programs for my customers, and I am well aware of the potential savings, and what today's oil has to offer.

