Originally Posted by BIG CHEVY 3600
I guess after all this, it means any oil (10W30) will do?
The Bob Olree article is from Dec. 2007.

Here's a May 2008 article that looks at Bob's statements one by one and comes to the conclusion that ZDDP needs to be added. http://zddplus.labecon.com/TechBrie...Just%20Another%20Engine%20Oil%20Myth.pdf

But this is all old data, data to old to use today.

Manufacturers change oil formulations constantly. The only way to be sure is to look at the oil you want to buy and see what the ZDDP level is every time you buy the oil. If you use a flat-tappet cam run an oil that has at least 1000 ppm ZDDP.

Just because the oil you bought for the last oil change had the correct ZDDP levels doesn't at all mean it will the next time you buy it. Caveat Emptore: Buyer Beware.

I would recommend using Valvoline VR1 10W-30:

"Contains 75% higher zinc than SM motor oil with a balanced additive package designed to work in both racing and street-legal applications. This product will protect older style push-rod and flat tappet engines. Valvoline provides this product in both multi and mono viscosity grades: 20w50, straight 50, 10w30, straight 30, straight 40, and straight 60."

Good luck and God Speed thumbs_up

Last edited by Hot Rod John; 10/03/2014 10:43 PM.