Patent ID: 8541635

Claim:
A method of operating a diesel powered car in a race, the method comprising: operating the diesel powered car in the race over a period ranging of from about 5 hours up to about 30 hours; the operating comprising burning a fuel composition comprising an improved fuel blend comprising (a) a first amount of mineral derived gas oil, (b) 25 vol % or more to 30 vol % or less of paraffinic fuel, and (c) 21 vol % or less of a naphthenic rich blending component having a kinematic viscosity at 40° C. of between 6 and 30 cSt, the improved fuel blend having a cetane number of at least 62, a kinematic viscosity at 40° C. of greater than 3.0 cSt (mm 2 /s), and a density at 15° C. of greater than 830 kg/m 3 ; wherein the Wear Scar value of the fuel composition is below 350 microns (μm), as determined by CEC F 06 A 96, and the improved fuel blend comprises a volumetric ratio between component (b) and component (c) of between 1:2 and 2:1.