I was able to track down five quarts of the green juice but I needed six quarts in my Dodge 4.7 so I used one quart of the domestic Syntec 10w-30. The truck runs decent on it but it has a mild tick when the engine is cold. The hot oil pressure is the same but I'm a little less than pleased with the tick so I may dump it and go back to 10w-30 synthetic.