Rislone High Mileage Engine Treatment, 16.9 oz - amazon
One bottle of 4102 Rislone Engine Treatment Concentrate 16.9 oz. is designed to treat 4 to 6 quarts of oil. For larger systems, stationary engines and diesel trucks, use 1 bottle for every 5 quarts of oil capacity. For severely dirty engines, use 2 bottles (double dosage) of Rislone Engine Treatment Concentrate and change the oil and filter ...