The samples had been prepared by blending of B0 which meets the requirements of the EN 590 with a sulfur contents below 15 mg/kg only with other fuels such that the resulting final blends for B5 and B7 also met the requirements of EN 590. Other samples all contained less than 15 mg/kg sulfur. Since Specifications D396 and D975 both include grades with sulfur above 15 mg/kg, these precision statements are not based on samples with sulfur contents in the range of all specification grades. The effect of sulfur contents or other associated differences in fuels will have on the precision of this test method is unknown.