Guys the breakin in the manual states to use regular 24/1 oil mix 2 cycle oil then go with the synthetic but I never heard of using mineral oil this motor is bullet proof I've crashed it hard at least 3 times and put it in our lake and have done nothing to it except get a new head thanks horrizon hobby s. due too. Oh yes don't over tighten the damn spark plug and if your havering a hard time with the plug cap u just push on and quarter turn by far guys there not a better 10 cc out there gas is so much more east than glow.