John Mc Clure
Blue Devil worked great in my 1984 Subaru. I put it in let it run for the 50 min and the white smoke from the exhaust was gone. The car runs cooler now, and at 365,784 miles I am impressed with the Blue Devil product. I have another Subaru that may have a slight blown head gasket and I am going to try it out on it.
I used your blue devil this weekend on a truck that had a bad head gasket leak. I was skeptical that it would work, but since I have driven it 300 miles and not one issue with adding coolant or overheating, and the check engine light cleared. Exhaust has also cleaned up. Best money I've spent on this ride. Thanks!
