I think I've heard that this is good stuff. I've run Golden Spectro all summer and the bike runs good, absolutly no spooge and have never fouled a plug. I plan to rebuild the top end this winter and check the KIPS. I've heard from somewhere that Golden Spectro can gum up the power valves a little more that other oils and thought about switching to the Mobil1 MX-2T. after I use up all the Golden Spectro.