Originally Posted by vtecaccord01
amsoil is a great oil but a little on the expensive side. I tried it once and it's not that bad. So far the best oil that shows a greater effect on my car is Royal Purple. Mobil1 is also good. Just use 5w-30 and your fine. I want to try some redline motoroil but that is a little $$ also.
I thought Royal Purple IS another name for AMSoil where AMSoil is the generic name. Nevertheless, AMSoil WORKS and has been proven many times over and over again. Check with them to see which product is right for your car (due to milage, vehicle type, etc.)