These oil-resistant fuel hoses have a nitrile tube and a nitrile and PVC (polyvinyl chloride) cover. The hoses are used for return fuel lines, positive crankcase ventilation (PCV) systems, and evaporative emission-control (EEC) systems in motor vehicles. They are approved for use with leaded and unleaded gasoline, diesel gasoline blends or ethanol (E85), methanol, and ethers up to legal limits allowed by the EPA. These hoses are not for use as pressure lines on fuel-injected engines or in cooling-system applications.