ASP's where designed with low to no nitro in mind. So you don't have to have the added expense. Run 0 to 5% nitro. As far as oil is concerned at least 18% of ether synthetic, castor or a combination of the two. 18% Oil content per gallon is a minimum and is what most fuel here in the states contain. Some folks will and extra oil to there fuel to bring it up to what Clareance Lee of RCModeler recomends 22% oil. So long as you don't run your engine to lean 18% oil is fine.
Good luck and have fun!!! [&:]