08-20-2007, 09:14 AM
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Renegade Nuns on Wheels
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Join Date: Aug 2001
Location: columbus,
Oh
Cobra Make, Engine: Unique 427 roadster with 351C-4B
Posts: 5,129
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Not Ranked
From ED, a chemist at Shell:
"Shell Rotella T Multigrade Oils in the API CJ-4 formulations contain approximately 1200 ppm zinc. This is down slightly from the typical 1400 ppm zinc found in the previous API CI-4 Plus formulation. However, in critical applications, such as gasoline engines with flat tappets, push rods, etc., we believe the new formulations still have enough zinc to provide adequate protection. In diesel engines, the new formulations gave the best protection from wear ever seen in the Shell Rotella T Multigrade product line."
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