For what its worth. I have independent, non biased laboratory test data that is documented, stamped,witnessed signed, validated to industry standards for a heads up oil test. The oils ranged from elcheapo plain jane standard types of valvoline,castrol,etc. then it went up to the mid class oils,some of these were the factory oils of yamaha, honda, suzuki etc; then all the way up to the exotics/racing synthetics which all were very expensive. In the exotic class entrants were mobil1, silkolene, royal purple, lucas, red-line, amsoil, etc etc. All oils were subjected to the same test under controlled conditions. There were about 20ish test. To make an already long story short, amsoil came out the winner. AND no I dont regularly use it.
