Originally Posted by tzone
My truck now tells me when it's time. 7-10K miles now.
What if yer truck forgets? laugh laugh

(FWIW, mine does too but I go by my records to make sure.. )



Originally Posted by Dutch
There's more to oil than viscosity. The levels of additives and the base (ability to resist acidification) are equally critical. Other issues, like fuel dilution and soot (diesels) can affect viscosity, but not always in predictable ways.

Oil analysis is cheap and effective, particularly on diesels with large oil sumps.
Exactly.. I have Blackstone Labs run an analysis at every change... So far, so good...


Ex- USN (SS) '66-'69
Pro-Constitution.
LET'S GO BRANDON!!!