5 liter jug of high quality German Liqui-Moly Racing Synth 4T 10W-50 engine oil. This is the fully synthetic engine oil with API-SL, JASO MA rating (can be used in the wet clutch on K1200 series bikes). This is enough for 1 oil change on all Oilheads, K-bikes and Hexhead R1200 series bikes with 1 liter left over for topping up. Also enough for 2 oil changes on an Airhead bike with 1 liter left for topping up. Compare to BMW's retail price of $72.50 for 5 liters and save here!