This STA-BIL starting fluid saves starters and batteries by helping get engines started quickly. Starting fluid is a special formula with upper cylinder lube and corrosion inhibitor. HEET starting fluid is safe for oxygen sensors and catalytic converters. It is for use in all gasoline and diesel engines in cars, trucks, tractors, buses, marine engines, lawnmowers, snowmobiles, snow blowers, and construction equipment. Note: Not for use in engines with manifold heating aids or pre-combustion chambers with glow plugs.