Kinematic viscosity at 20C, mm?/, max: Flash point in closed cup, C, min. Pour point, C, not higher than Sulphur, wt. %, max. 61 1.5 5 6 7 10 11 12 Mercaptan sulphur, wt. %, max. Water, wt. % Carbon content, %, max. Water soluble acids and alkalis Ash, %, max. Sediments, wt. %, max. Density at 20C, kg/m', max. lodine number, g of iodine/100 g of fuel, max.