Ok, I know there has been a many discussions on synthetic versus dino oil. Lord knows, I have been the victim of Mobil 1, Castrol Syntec GC. And Amsoil. But hey, I have concluded, what is the point? Point #1 There is NO DOUBT that I have an obsession with changing my oil, or keeping it clean I guess would be better terms. I can buy Havoline 10/30 for $1.17 a qt at walmart. Buy 5 of them. Go to Napa and get a Napa Gold filter for $7.00 and change my oil every 2,000 for around $12.00. So don't get me wrong. I know syntethics would be better if you left them in for a long period of time, but as people had pointed out, they would not go extended drains without an anyalysis done. So again, more money. Again I ask, what is the point. At the 2,000 mark. I KNOW that I have fresh oil and a great filter. Frank. Just for kicks. My favorite dino oils are and not in any kind of order. 1. Havoline 2. Castrol GTX 3 Pennzoil. and that is about it!