In response to the above comments this oil is as stated by the company - <font size="2">Royal Purple® 2-Cycle TCW III is recommended for use in both pre-mixed and oil injected gasoline two-cycle engines in outboard motors, motorcycles, jet skis, chain saws, etc. So it will do better than a water cooled aircraft engine. After running for a number of flights and getting better results than any other oil on the market in the UK.  Sarcasism is unncessary as I was trying to bring something possibly a little helpful to this forum.</font>