Is the Oil indicator Based on Mileage rather than Oil condition?
May be a dumb question but when using Mobil 1 (Dexos 1 approved) that engine oil percentage does not seem to care. It still fires off around the 5k mark.

I did check the Mobil 1 Extended life High Mileage oil and notice it does not have the Dexos stamp of approval. Opss!!

 

Well, the book says it is based on a performance AlGorethm. My personal experience is approx 13,000 miles.

I don't recommend the use of ANY "high mileage" "extended life" or whatever oils. They have additives that are not necessarily "good" in the long run.

 

I use Mobil 1 and get the same info, about 5k

 

I've been using Pennzoil Platinum for years... I get over a year, 10K plus between changes. I end up changing long before the DIC says I have to.

 

Good old oil threads never die lol . But a lot of good reading for me at least :) Like a lot here I can not go the manufacture change time. Yes old school used to be3 k changes lol. I go about 5/6k with 100% Synthetic in my HHR .My RAM and my bikes ! For the few extra $$$ for me it is cheap insurance to maintain a vehicle ! But that is me, IMO Proper Oil changes are one of the most important parts to help a car run longer !

 

In my HHR, I used whatever Full Synthetic was cheapest at the time I was in the store, and only used AC Delco filters. I changed every 6-7 thousand miles, at that point the percentage of oil life was down to like 55% or something. I did a lot of highway miles.