Purchased plane with thundertiger .91 4 stroke. reading tech notes on towerhobbies said to use good quality 2stroke fuel. does anybody know why. any input would be great, thanks Ritchie

I use 15/20 on mine. They seem to like that fuel.

Everyone just uses two stroke fuel in their four stroke engines.

I mostly use Morgan's Omega 15% nitro two stroke fuel in my many four strokes. When I get ready to run a two stroke, I use the same fuel.

Enjoy,

Jim

I use Cool Power 15% on mine, she is happy. I do not use any fuel with castor because I am too lazy to clean up, its not hurt any of my engines. Also, I always check engine temp when I land. Keep it hot and not super hot. I believe in keeping my engines with a head temp of about 220F to 240F max, usually my engines are about just under 220F.