RC engines use a mixture of methanol, oil (castor or synthetic) and usually nitromethane. if the engines youve bought are used, put some afetr run oil in before you turn them over as the lube in the fuel can't protect an engine that is completely dry. Follow this link, http://www.airfieldmodels.com/inform...ines/index.htm, there is some good reading there.

You should get some good advice from this forum also. Good luck and enjoy!