To remove diesel fuel from clothing, first, place the stained areas facedown on paper towels. Apply dry-cleaning solvent to the back side of stain, replacing the paper towels frequently. Allow to dry, then rub in liquid detergent or dampen stain area with water and rub with bar soap or detergent paste. Rinse and launder. If any odor remains, add 1/2 cup of vinegar to the rinse cycle of you washer, as this should take out any remaining smell.