I've been planning on running Drew's Brew for some time now, last night I was in walmart pickin up my Rottela T for my oil change and finally remembered to pick up the PSD and MMO. I mixed it up and topped the tank. about 30 seconds after I started it I could already tell a difference in how smooth its running, hopefully I get some MPG increase. I'll post my MPG results when I burn this tank seems like good stuff so far...