quote:Humm you do know that all the big 4 car makers used soft Iron for the flat tappet cams with "external" harding. The worst thing you can do is idle the motor very long because the cam is splashed lubricated. It would have helped if you said what motor. Because you don't want to use a high ash motor oil in a 11:1 or higher forged piston motor out of the muscle car time frame. Because they do burn oil. A forged piston motor should also use a heaver base oil than 10w generally.
Originally posted by vettenuts: Looking for some recommendations. Have an older Corvette with low mileage that has the GM soft camshaft problem. Currently using Castrol GTX 10W-40. Is there another oil that would better protect the camshaft in this car? TIA