Diesel Smoke Cleaner is a concentrated blend of shear stable polymer which has been specially formulated to help reduce oil burning and smoke emission in older, high mileage engines. ADVANTAGES • Seals gaps between worn engine parts • Reduce exhaust smoke and emissions • Reduce engine oil consumption • Improves compression and performance APPLICATION Add entire contents of the bottle directly to the engine oil at or between oil changes. Suitable for use with mineral and synthetic engine oils.