Guaranteed faster starts down to -65 degrees F. Upper cylinder lube. For gasoline and diesel engines. High ether content delivers fast start. Works up to -65 degreed F (-54 degrees C). For gasoline and diesel engines, including cars, trucks motorcycles, tractors, buses, marine engines, lawnmowers, snowmobiles, snow blowers and construction equipment. Contains upper cylinder lube and corrosion inhibitor. Saves starter and battery. Will not harm catalytic converters or oxygen sensors. From the makers of: 104; No Leak; Sta-bil. Made in USA.