Total 802351 Neptuna API GL-4 40W Gear Oil - 20 Liter Pail A mineral based oil for use in pleasure craft transmissions for which a grade 40 engine quality oil is recommended Its special formula enables it to meet the requirements of transmissions which require a quality grade 90 gear oil Meets the most stringent international specifications for gears: API GL-5 In conformity with MIL 2105 D specification 20 liter (5.2 gallon) pail