[Inyo-Mono]

and by the way- warming up a car has more to do with wear and tear on things like pistons, rods etc- the oil is cold, and will not flow well, and if you simply start up then take off and floor it. you are putting tremendous stress o n things like the piston because they aren’t properly lubricated due to the low flow due to being cold

Exactly! Which is why I warm up my Jeep every day before driving away. It may be an '05 year model, but it has a 4.0 6 cylinder engine originally designed in the 1970s.

[Ozark Tom]

Are you adding zinc additive to your motor oil to keep the push-rod engine happy? As overhead cam and roller lifters have become more prominent, the anti-wear high pressure additives have diminished in current oil formulations.