I have Cool Power 10% and my thread from the other forum said ABC engines need some castor oil. Can I buy some castor oils and mix it with the fuel. I have the fuel in the 1 gallon jug and so far only 20 oz has been used. If i can mix some castor oil then how much oil do i put into the jug. The label said that the fuel contain some rust inhibitor and after run oils should not be used... well I didnt read the label so I did put some after run oil in so would that damage anything? How do you prepare the engine for storage after a day of flying? All I did was pull of the fuel line and let the engien run itself dry, but when i opened the backplate I saw specs of rust on the crankshaft. Whats goin on, I thought the fuel protected the engine from rust. And that was its first run out of the box too.