You guys must be bored. To keep argueing over something so trival. Fine its the best oil ever invented. I considered the statement as just a really satisfied over dramatic assessment of a product, nothing more. You guys are reading into this way too much. Its simply a opinion. I have high regards for the yamalube 2R, simply because engines were so clean when I tore them down and I hardly ever fouled plugs. Just my opinion. I wish I could have gotten to try the Mobil oil before it became extinct. Anyone I talked to held it in high regards. The Polaris 90 would run fine on anything from boat oil(TCW3) to racing oil. Not real fussy machine or maxed out on stress.