I had a Magnum .30 four stroke in my T-craft, and it was a great combination. It's a really reliable engine, and has a reasonable amount of power. I can't compare it to the OS for power, but I was happy with it. You don't need to worry about carrying a different bottle of fuel with you either, you won't do the engine any harm with an average sport fuel. Four-stroke fuel has less oil anyways, not more.