03-16-2014, 07:31 PM
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CC Member
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Join Date: Jun 2010
Location: The Big Island,
HI
Cobra Make, Engine: Unique 289 FIA, 347 stroker
Posts: 27
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Not Ranked
Hi, Tom,
I have a 347 also, built for me by Proformance in New Jersey. The engine came with Gibbs 15W-50 motor oil, and the builders recommend that or 20W-50 or 15W-40. I use the latter grade in Chevron's Delo as I have several diesel engines to maintain and it keeps stockage simple. The Delo--and Delvac for that matter--has plenty of ZDDP, so you don't need to add it.
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