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.
* An estimated 2 in every 3 litres of petrol contains (4-5%) ethanol. * Ethanol can be highly corrosive to many materials used in engines/fuel systems and can cause other problems. * c.769,000 bikes may be incompatible with E10 fuel, although many manufacturers' bikes have been compatible since the mid-1990's.UMMARY. * The addition of ethanol to petrol is being driven by the oil industry (globally), the automotive industry-and the European Union. * Standard pump petrol can contain up to 5% ethanol without being labelled, in future it could contain up to 10% ethanol (E10).