Anyone try it yet and have thoughts on it?
Says right on the bottle that this product is not intended for street-driven vehicles. I would guess that has something to do with them being able to sell it legally, they aren't telling you to use it in your "daily driver".
It's not on the EPA hotlist, but rather, the motor oil is. The EPA mandates that the catalytic converters must last 100,000+ miles and it's the elements in the additive that cause it to lose its life. So they tell the car makers to stop using it in the oil. That's fine, since all engine manufacturers use roller cams.
It's made for the flat tappet-cammed cars. Personally, I believe it's a necessity and something the aftermarket cam manufacturers missed bigtime. Look at all of the stories from GN owner in the last six or seven years regarding cams going soft. I believe lack of this additive is the real culprit. The engine oil you buy today has none of this in it. The oil you bought in 87 had it.
Cheap insurance for sure.
I'm on my second oil change with the Kirban/Clark ZDDP additive. without access to a testing lab, only time will tell if it works.
as for the EPA, not sure how they're getting around that.
Here is probably more info than you care to read about this stuff. Rich, the maker and a board member here contributes significantly to this thread.Ok, fair enough. Then my next question would be, when they get a barrel of the stuff do they shake it before they put it in the little bottles? Most of the stuff in the additive would sink. So does every bottle contain the same amout of additive properties? This question was asked before and got no response. Just trying to be safe before I try it.