Oil – Universal Tractor Oil 10W/40 STOU, 20 Litres. KRAMP MULTI-OIL 10W-40 STOU is a multi-functional semi-synthetic oil for lubricating all mechanical components in tractors, agricultural machinery, public transport vehicles and related equipment in all seasons. It is suitable for the following applications. Mechanical transmissions equipped with wet brake discs. Gearboxes, differentials, shafts, gears, etc. …