Lucas Sure Start Premium Starting Fluid is a 50% ether blend, more than the leading national brand. Helps start stubborn engines fast in cold weather, saves batteries and contains upper cylinder lubricant. Performs to -65°F. For use in passenger cars, diesel engines, lawn mowers, chain saws, outboard motors and fractional horsepower engines. This diesel fuel additive complies with federal low sulfur content requirements for use in diesel motor vehicles and non-road engines.