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Re: What's the best oil for a old tired engine?
Quote:
Originally Posted by spudz
Rotella USED to have zink in it and that was good for keeping things nice and happy. BUT they took most of the zink out of it a couple years ago... Its no more helpfull then some 20w50 now
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Another one....
Rotella has MORE "zink" (zinc) than other oils. Actually, ANY diesel oil is going to have more zinc content than other conventional oils, even after they cut back on the zinc content.
The zinc concentration in Rotella is something like 1200-1400 ppm VS. ~600 ppm (or less) for non-diesel oils. So yes, it WAS higher a few years ago, but ~1200ppm is still plenty for an old engine.
Besides, what does zinc content have to do with weight of the oil???
This guy has a worn out old engine. Just run it.
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