I just ordered some Auto-Rx for my Ranger. I believe everyone on here when they say how well it works. My question is as follows. On the Auto-Rx site it says after the 500 mile application, you change your oil and filter. But the thing that bothers me is that it says to add 3oz of auto-rx every 3K to help keep from carbon building up and continue to run Non Synthetic oil. I'm a Die Hard Amsoil user, never had trouble with the stuff and has truely saved me and my wallet. I want to use synthetic in my Ranger but Auto-Rx requires dino oil. Can I just run Amsoil w/o Auto-Rx and be fine or do I really have to do the 3oz every 3K miles?????? If this step is truely necessary then I have no problem with it. Bottom line question: Do I need to perform the 3oz every oil change step and use dino oil, or can I run Amsoil w/o the use of Auto-Rx and not damage my engine. Tks everyone,,,,,AR