XPS kart Tec Castor racing oil is especially developed for the Rotax MAX high performance kart engines. This is the mandatory control oil used in official Rotax MAX series. 

Great engine performance also at high thermal load.
Great durability of all engine components
Less deposits inside the engine 
Reduced carbon built up at piston (also valid for Micro and Mini MAX)
Great miscibility and low separation over time 
CIK-FIA approved