HD DIESEL is a fully formulated heavy-duty diesel motor oil. Advanced chemistry blended with high-quality petroleum base stocks offer excellent protection from the stresses of heat, soot and acids – preventing wear from deposits and corrosion. Elevated levels of detergent/dispersant help to eliminate the formation of larger combustion particles – minimizing soot-related viscosity increase – allowing for improved drain intervals. HD DIESEL maintains excellent film strength during high-temperature operation to ensure dependable protection, performance and fuel efficiency. Highly refined petroleum base stocks provide outstanding lubricity and resist oil loss due to oil volatilization.