SPORTPLUS4-1L designates a 1 liter package of AeroShell Oil Sport Plus 4, a multigrade piston engine oil formulated for light sport and very light or ultralight 4-stroke aircraft engines. It is used in engines such as the Rotax 912 and 914 series that combine the engine, integrated gearbox, and overload clutch, supplying lubrication for all of these components in service with unleaded aviation fuels, road fuels, and Avgas 100LL.