Regulation of iron absorption and transport. Iron for use in synthesis of heme, iron-sulfur centers and other non-heme iron proteins is obtained from the diet and via release of recycled iron from macrophages of the reticuloendothelial system that ingest old and damaged erythrocytes (red blood cells).
Four-stroke oil is more like the oil used in cars but both 2-stroke and 4-stroke oil serve the same purpose - to keep the engine lubricated. Four-stroke dirt bike oil comes in a variety of weights like 10w-40, 20w-50 and so on. It is not mixed with gas.
Any japper EFI bike -----> Low octane good higher octane better. Any bike with carby-------> use normal unleaded-> High octane fuel eg 98 can clog your carbies as it has detergents in it to clean the fuel system, these can clog your needles, efi bikes have a fuel filter. Any bike using e10--------> get your head read.