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% (m/m) C4 C5 C6 C7 C8 C9+<br />

Naphthenes 0 5 10 10 10 10<br />

Olefins 5 20 20 15 10 10<br />

Aromatics - - 1.2 35 35 30<br />

The total concentration of bicyclic naphthenes and bicyclic olefins<br />

may not be higher than 1% (m/m). The test method used will be<br />

gas chromatography.<br />

d) Only the following oxygenates are permitted:<br />

Methanol. Ethanol. Iso-propyl alcohol. Iso-butyl alcohol. Methyl<br />

tertiary butyl ether. Ethyl tertiary butyl ether. Tertiary amyl methyl<br />

ether. Di-isopropyl ether. N-propyl alcohol. Tertiary-butyl alcohol.<br />

N-butyl alcohol. Secondary-butyl alcohol<br />

e) Manganese is not permitted in concentrations above 0.005 g/l. For<br />

the present this is solely to cover possible minor contamination by<br />

other fuels. The fuel will contain no substance that is capable of an<br />

exothermic reaction in the absence of external oxygen.<br />

2.7.3 Air<br />

Lead replacement petrols, although basically free of lead, are not<br />

an alternative to the use of unleaded petrol. Such petrols may<br />

contain unacceptable additives not consistent with the FIM Fuel<br />

Regulations.<br />

Only ambient air may be mixed with the fuel as an oxidant.<br />

2.7.4 Primary Tests<br />

2.7.4.1 The FIM may require tests of fuels to be administered before, or at<br />

the time of delivery to, an event at which such fuels are to be used.<br />

2.7.4.2 The FIM may request any person or organisation, being a<br />

potential Official Supplier of fuel, to submit a sample for testing for<br />

conformity with the fuel specifications.<br />

128

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