Has anyone had any experience with ZAK Differential Oil Additive? Or even heard of it?
A few months ago, the dealer (that used to be good) changed the oil in both differentials on my Outback and supposedly added some of this ZAK Differential Oil. I've gotten used to the idea that it is in there. But I'm hoping that it doesn't cause any damage.
ZAK is supposedly a Berkshire-Hathaway company, so not good news there. But it is also supposed to be a limited slip additive, and neither of the Subie's diffs are limited slip.
Any thoughts? And thanks.
A few months ago, the dealer (that used to be good) changed the oil in both differentials on my Outback and supposedly added some of this ZAK Differential Oil. I've gotten used to the idea that it is in there. But I'm hoping that it doesn't cause any damage.
ZAK is supposedly a Berkshire-Hathaway company, so not good news there. But it is also supposed to be a limited slip additive, and neither of the Subie's diffs are limited slip.
Any thoughts? And thanks.