Shell Advance base oil blend is specially selected to provide maximum protection to all key parts of a 2-stroke engine, especially the pistons, bearings and exhaust system. The choice of additives selected depends on the amount of stress and chemical attack that the bike components need to withstand.
As 2-stroke oil is fed into the bike via the fuel system, the important additives that protect it are continually replaced. This means that the formulation of 2-stroke oil is very different to that of 4-stroke oil – which remains in the bike sump until the next oil change.
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