I personly was hunting around and around for oils for both my Wagoneer (stock AMC 360 2v) and my Barracuda (modified 340). I ended up settling on the Brad Penn 0W-30 for the Barracuda because of how cold it runs and the type of use it sees. I had tried the latest Penzoil and was never sure I was getting the same thing as they kept renaming the product.