The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What oil are you using in an older flat tappet motor?

sick472 · 01-04-2022, 09:06 AM

I've been using the Rotella 15w-40 in my older V8 vehicles ('67 to '85) for several years now. 13k miles on one, 2k on another, and 20K on a well used 350 which has recently been rebuilt with 2k on it currently...so, not a lot of miles on any of them and no oil expertise on my part. It is said to have more zinc than most AND I like the way it smells, lol.

01-04-2022, 09:06 AM	#7
sick472 Registered User Join Date: Jul 2015 Location: Sedalia Mo. Posts: 1,131	Re: What oil are you using in an older flat tappet motor? I've been using the Rotella 15w-40 in my older V8 vehicles ('67 to '85) for several years now. 13k miles on one, 2k on another, and 20K on a well used 350 which has recently been rebuilt with 2k on it currently...so, not a lot of miles on any of them and no oil expertise on my part. It is said to have more zinc than most AND I like the way it smells, lol. __________________ He who is without oil shall throw the first rod. Compressions 8.7:1 1972 C10 1976 C10 (parts truck) 1985 K20