Hi,

I believe that the make of oil used in our two strokes contributes in a major way to the carbon buildup in engines. In the tests that I ran a year ago, all oils caused carbon except Belray which is the one the uav guys in silversurfer's group use. If that group changed oil brands, they would have more problems. In fact, based on silversurfer past comments, I believe they used to have problems.

Elson