Red Line 10W40 High Performance Motor Oil. Popular for medium and heavy-duty gasoline engines in light trucks. Best choice for high-performance engines that see street/strip or track activity. Great for engines with high oil temperatures. Thicker oil film at operating temperature than a petroleum 20W50. Recommended for API SN/SM/SL/SJ/SH/SG/CF and ACEA A3/B3/B4. 1 quart / 0.946 liter bottle.