In general, the market of two-stroke engine oils is stable in Europe and the US. In Asia and Africa it is increasing.
A two-stroke engine is required to operate on a one-pass, total loss basis. The oil is introduced into the engine either pre-mixed with the fuel or by direct injection using a demand pump. The oil functions as a lubricant for the crankshaft, bearings and combustion cylinder and is then consumed along with the fuel. Products of decomposition are lost through the exhaust system. Oil is therefore used continuously while the engine is in operation.
To meet environmental concerns as well as keeping the extreme high performances, POLYBUTs are used between 30% to 55% in two-stroke oil formulation.