i use sidewinder 30% race blend in all my race engines and love it. alot of fuel out there that has compant names on it are made by a fuel company and a label put on it. i.e. duratrax,o'donnell etc. nothing wrong with these but they are made and blended by another company. sidewinder is made by morgans fuels and thats what they make fuel and only fuel,byrons and wildcat(eliminator) are the only ones like this left,that i know of. go with the sidewinder you wont be dissappointed.