Heavy-duty formula for Big Twins offers extended performance in severe operating conditions Ultra-high film strength gear oil provides excellent protection against shock loads, wear and increases fluid durability Unsurpassed extreme pressure additives and surface active chemistry allow smooth shifting under peak loads and RPM Recommended for use in 4-, 5- and 6-speed high performance gear boxes Meets and exceeds all known OEM requirements and API GL-5 specifications. OIL V-TWIN TRANS85W140 QT