Recommended Fuel and Oil
Krash sells skis all over the world and makes the engine on the conservative side to accommodate the different quality of gasoline and oil that is available.
Krash recommends using a non ethanol gas but if you have trouble getting it, like I do, use a treatment like the one (listed below).
For oil make sure it is an oil that helps to protect against the occasional water ingestion that can occur in freestyle skis. I’ve listed my favorites below with photos that are also clickable (links may or may not work depending on how old this post gets).