Originally Posted by Bikeguy Joe
DO NOT USE OUTBOARD OIL FOR AN AIR COOLED ENGINE.
Get the all purpose stuff in the lawnmower area if you are uying you oil at Walmart or K-Mart.
Joe, do you have first hand experience that is true? Mark Smith, top ultralight expert in the US, recommends it for Rotax full size airplane engines and I have been using it and other TCW3 formulations on my bikes and planes for years with excellent results. Is there any credible evidence anywhere that it causes wear or seizure?