Re: Which Engine Oil?

Posted by Dave Kenney On 2007/10/3 10:09:04
I have been using Rotella in my '47 for two years and it seems to fine. My one concern is that the 15/40 is now rated as a CJ4 and SM oil and I am worried about the absence of "zinc" (ZDDP) which I have read can cause damage to flat tappet valve lifters. I am considering using a cheaper brand that is rated SL or using a additive with the Rotella like GM EOS oil fortifier. If you Google the topic you will find all kinds of information and I suppose misinformation on the subject.

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