Benzina di riferimento: miscela del 50 % in volume di toluene, del 30 % in volume di 2.2.4. trimetilpentano, di 15 % in volume di 2.4.4 trimetil-1-pentene e del 5 % in volume di alcool etilico.
Reference gasoline mixture of 50 % by volume of toluene, 30 % by volume of 2.2.4 trimethylpentane, 15 % by volume of 2.4.4 trimethyl-l-pentane and 5 % by volume of ethylalcohol.