buickanddeere
Super Member
Yes the manual says never to exceed 1 year or 10k miles and to do it when the computer says to do so. However I don't know a single person that would be that carefree to go that long. The lube oil is the life's blood of the motor. Having good clean oil in your engine is essential to longevity and performance. This is especially crucial to a sophisticated forced induction engine as these. It's also cheap insurance from wear and damage. All I can say is good luck to whoever buys the truck after you've had it.
If the oil is not dirty or had the additives depleted . Why pour out perfectly good oil and pay for new oil and filter ?
For those who have not noticed . There has not been oil bath engines with carburetors , points ignition systems burning high sulphur leaded gasoline for several decades. Have a look at the calender , it's not 1965.