so i was looking around latley for a gas engine cause i HATE the mess of oil all over my plane when im done flying. wat i was wondering is what brands are out there for gas engines that are for .60 size planes and lower? and from wat i have seen there are not many out there for smaller planes. Y do you guys prefer nitro over gas? wat is the differance in maitnance?

P.S. Thank you for your time and answers.