Coleman fuel itself runs great in a gas model engine but people use a fuel - oil ratio of 40:1 and also various other ratios from 32:1 and even 100:1 with some oils....

I never was able to get one to start with 40% oil. It was expensive too. I put bar oil in the wrong tank on a chain saw one time.

The Coleman fuel doesn't ping in the usual engine and it smells better than gasoline.

Enjoy,

Jim