Engen Xtreme 20W-50 is a high performance, mineral based, engine crankcase oil designed for use in “high mileage” petrol and diesel engines of cars, mini-buses and bakkies, both naturally aspirated and turbocharged. It is formally approved against API Service Classifications SL/CF-4. The product is also suitable for high performance 4-stroke motorcycles fitted with wet clutches and meets performance levels JASO MA and JASO MB specifications. Engen Xtreme 20W-50 is uniquely formulated to protect against sludge and oxidation, reduce engine wear and keep pistons clean. It is formulated using low volatility base oils and blended to a SAE 20W-50 viscosity grade to reduce oil consumption in higher mileage engines. Its highly shear stable viscosity index improver ensures “stay-in-grade” performance between oil changes.