Mileage Eco 20W-50 High Quality CNG Engine Oil is a lubricant that is required to ensure the smooth working of moving parts of vehicles. It is known to reduce friction between rotating assemblies resulting in low heat generation. This oil is also known to move away from small impurities and debris that can cause the wear of moving parts. It is highly appreciated for having the ability to reduce low-temperature sludge build-up to keep the engine in excellent condition. Mileage Eco 20W-50 High Quality CNG Engine Oil prevents corrosion of moving assemblies and enhances seal and gasket life.