...And Cyborg,

This engine has an ABN piston and sleeve...

Even the makers of 'Cruel Power' don't recommend it for this type of engine; specifying 'Omega' fuel instead.


Using the all synthetic fuels for these engines may keep your plane cleaner, but Omega with Castor oil will be easily wiped off with Windex and a rag, while keeping your engine in better shape, for longer.