One thing to take into account is cars run a higher percentage of nitro than planes. That might have something to do with the cost difference. Another thing is like what's his name was saying, the amount of fuel that cars use is small compared to planes. The biggest buggy engine is typically a .21. The average plane uses a .40 or .45. and you can even get up into the .60's and even 1.20's. Since we use less, they're gonna jack up the price and get the same amount of money that they would from both hobbies.