Thread: 15W40 Vs. 10W40 Pro's/Con's, Which ones BETTER?
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Old 09-29-2006, 11:30 AM
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Benzadmiral Benzadmiral is offline
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Question
Quote:
Originally Posted by waybomb View Post

This loss of ZDDP is not a problem to modern engines with roller camshafts. It is a BIG problem to those of us with flat tappet cams with higher spring pressures, such as in high horsepower engines. . . . All flat tappet cam shaft manufacturers now recommend use of Delo, Delvac or Rotella in flat tappet gas engines, or, "Off Road Only Racing Oil", and specifically warn against using regular engine oil and oils labeled "Racing Oil".
I don't know much about the anatomy of engines. Does the M111 4-cyl. have these flat tappet cams?
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