Yes and it works to help with friction, so how is soaking a piston in it going to help anything, its not like the piston is going to absorb it up. It will burn off just like the oil in your gas. But you can use the fuel treatment in the gas. 2-Cycle Treatment: Mix fuel and oil to manufacturer's recommendations, then add 1 oz. of zMAX Small Engine Formula per gallon of fuel/oil mixture. For best results, use zMAX Small Engine Formula in fuel consistently and treat engine oil every 6 months or 50 hours.