I run Mercury Quicksilver oil in my bass boat and am running it at about 30:1 right now in my mapbike but when I get my engines broke in good I will switch to Schaeffer Full Synthetic 2cycle oil that has a special Moly additive that they claim will out perform any other oil on the market, I have used their Moly grease and I have friends that will not run anything but Schaeffer products in their trucks, cars and farm equipment because of it's quality so I figure at only $6.49 a quart I will give their 2 stroke product a try and see if it does what they say it will. If anyone out there is running or has run the Schaeffer 2cycle oil ring in and let me know what you think about it.