Just found Amsoil 5W30 at my local Napa Auto Parts for $5.49 a quart. I currently use Mobil 1 SuperSyn 5W30. I just want to give Amsoil a try and see how my engine runs and responds to it. What do you think about this? My conservative plan is to run Amsoil for 7,500 miles and then do an analysis. I've ran Mobil 1 5W30 for the life of the car and the car has aprox. 92 K on it. I've changed out the Mobil 1 every 3-4K like a wasteful dopehead until I found this board (Thanks for the info. folks). Would I need an engine flush like Auto-RX before running the Amsoil? I wouldn't think so since my Honda Accord has seen synthetic for the life of the vehicle.