Castrol 06246 EDGE 10W-40 Advanced Full Synthetic Motor Oil, 1 Quart, 6 Pack Advanced premium full synthetic motor oil to offer strength under extreme pressure Titanium strong for maximum engine performance Reduces metal-to-metal contact across a range of different driving speeds Protects the engine for the entire drain interval even under extreme pressure Decreases engine deposit formation to help maximize engine response Best full synthetic money can buy API SN, ACEA A3/B3, ACEA A3/B4 Castrol recommends the use of Bosch oil filters