(12-Pack) MASTER Concentrated Motor Flush, 12 x 12 oz Bottles - Made in USA

MASTER® MFL12 Concentrated Motor Flush Dissolves heavy deposits and opens restricted oil passages to help improve oil circulation. Also cleans sticky valves, lifters and piston rings. DIRECTIONS: Make sure the crankcase oil is up to safe level. Warm the engine to normal driving temperature then turn engine off. Immediately before changing oil and filter, add Master Motor Flush to crankcase and run engine at Idle speed for 5 minutes. Drain crankcase and replace oil filter. Refill crankcase with fresh oil.