This thread is not to start an oil debate. I have been running Amsoil and I want to switch to something I can buy in a gallon for a good deal. I would go with Rotella but my local Wal Mart doesn't stock the synthetic. So I am going to try the Mobil 1. I am totally confused as to which Mobil 1 people are running. Red cap is discontinued, I heard Gold cap has the cleaning stuff we don't want, most of them have silver caps, Help me please!