"I went to change the oil in my old push mower. To my surprise there was NO oil in it! I put oil in the mower, started it up and it smoked and fouled up the spark plug. I poured all the oil out and cleaned the plug. It started right up and ran great, again, with NO oil in it...only the years of using zMAX. It's been a couple years now and the mower is still going strong with no oil. AMAZING!"