Mobil Super 4T 10W-30 combines highly refined, quality mineral oils and an advanced additive system to provide good engine cleanliness, good wear protection and corrosion protection. Key features and benefits include: Features, Advantages and Potential Benefits Good wear protection Helps extend engine life Thermal and oxidation stability Helps keep engines clean for smoother operation Good corrosion protection Protects critical engine components Broad viscosity range Year round engine protection and performance