Engine Oil Ranking - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**FirstOwner69** · 05-23-2017, 04:26 PM

I've seen numerous threads here about which oils are OK to use in flat tappet and high performance engines. Most tend to recommend oils with high levels of ZDDP. A friend has a bunch of oils from the late 1990s. This prompted me to search for more info on ZDDP levels in today's oils. The link below, from 2015, provides interesting info on ZDDP oils and wear protection. Obviously, I have no information on the author's credentials.

Comments???

http://www.sccoa.com/forums/showthre...*Good-read***&

05-23-2017, 04:26 PM	#1
FirstOwner69 Registered User Join Date: May 2010 Location: Wisconsin & Arizona Posts: 4,854	Engine Oil Ranking I've seen numerous threads here about which oils are OK to use in flat tappet and high performance engines. Most tend to recommend oils with high levels of ZDDP. A friend has a bunch of oils from the late 1990s. This prompted me to search for more info on ZDDP levels in today's oils. The link below, from 2015, provides interesting info on ZDDP oils and wear protection. Obviously, I have no information on the author's credentials. Comments??? http://www.sccoa.com/forums/showthre...Good-read**&



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