I really liked Powermaster's GMA 5/22, 10/22 and 10/29 fuels. When they quit producing for a while, I went to Wildcat Premium Extra (18% total lube) with added castor to get total lube where the GMA fuels were. Am still using the last of the Wildcat mixes and havn't had a problem -- performance has been predictable and consistent. Will go back to Powermaster now that they're back in business since it comes ready-to-use, but wouldn't hesitate to use Wildcat again should the need arise.