what oil to use
Ace..I have been wondering myself how much hype or BS all this zinc crap really is. At the Nationals this year there was a Royal Purple booth and they had all type of stuff about zinc and they were giving away a Corvette Enthusiast mag and it had a long article about zinc and how great Royal Purple was. A month or so later I get my first Mopar Enthusiast and they have an article in the back about cheap ways to increase horsepower, and one suggestion was using Royal Purple, stating they were getting up to 9 horsepower gain by switching over to it. Then the following issue they have this horror story about Zinc being decreased and low and behold and page 2 of the article one of the biggest pictures of the entire story is a bottle of Royal Purple. On Monday I just picked up a new motor I got from Hensley Performance, I brought up the zinc question and they said they use either Joe Gibbs racing oil or Joe Gibbs Cam break in oil (not 100% sure which one it was) for break in and to use a good oil. They use Valvoline VRI oil and suggested that or a comparable oil. Never said anything about adding a zinc additive or anything to the like. These guys have been building and racing Mopars for over 40 years and still run the Hemi S/S class.
Look how great advertising does for Fram oil filters, most people believe the hype and follow like sheeps.