[tsc1969]

I waited until 9000 miles and converted to Castrol Syntec 5W-30
Tim C.

 

[tsc1969]

You do have to reset after an oil change. I believe the oil life monitor bases it's percentages on time, mileage and driving habits.
Tim C.

 

[tsc1969]

However, the additive package (at least in our oil) is exactly the same. So, while the oil itself will stand up better to longer life, the additive package will be used up at the same rate.

Thanks for the info. I do have a question regarding the additive package.
I converted to synthetic for the "higher quality, cold temp start up properties and the longer change intervals."
For me, the longer change intervals may not apply due to the shorter driving distances I do. It may take me 6 months to rack up 4 - 5,000 miles.
I know the recommended change interval for conventional oil is 3 months or 3,000 miles. What should the realistic oil change interval be for synthetic oil? Does the "additive package" allow for longer change intervals regarding time or is the longer change intervals only regarding miles?
Tim C.

 

[tsc1969]

:thumb: Thanks for the info.
Tim C.

 

[tsc1969]

Thanks for that list. Great info!
Tim C. :thumb:

Here's a handy list of GM Spec GM6094M approved oils.