Guys, I got 4 gallons of 20% through my STS MT .12. Then the front seal started leaking.
For the money you pay and the reliability and POWER you get from one of these lil monsters is incredible.
I just bought another STS MT .12 and it's just as fast as my old one.... in fact the more time you put on one of these engines, the faster they are. They're not as squirelly as the OS based engines, but they provide a CRAPLOAD of power all the way to 30,000 RPM's. Not to mention a mere 1.35 HP, which is a modest number. I sold a new one to a guy in Omaha and he had it dyno'ed and he sent me a picture of the print-out... it showed 1.66 HP @ 27,600 RPM's !!!!!!
Try one and you be the judge...