01-23-2011, 08:22 PM
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CC Member
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Join Date: Feb 2007
Location: Colorado Springs,
CO
Cobra Make, Engine: Backdraft, supercharged Coyote
Posts: 2,455
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Not Ranked
Quote:
Originally Posted by RallySnake
I am having much better performance with the Shell Rotella 10/40. It runs just as good and doesn't leak everywhere. The oil pressure is much better, too.
I believe that it continues to have zinc in it which helps with that camshaft wear issue.
RS
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Diesel oils are all CJ now. I havn't been able to find a CI oil anywhere. The Cj oils have about 25% less zinc in them, because newer diesel engines have a cat. So it doesn't have the zinc a flat tappet cam really needs.
If you have flat tappets, you need to find something that has high zinc levels, like Brad Penn or RP XP. Or use a zinc additive.
My diesel engine has flat tappets, so it gets 2 bottles of Comp Cams break in additive with every 12 qt oil change. The cobra uses standard Royal Purple, and gets one bottle for every 11 qt oil change.
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BDR #1642 - Supercharged Coyote, 6 speed Auto
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