K&N Ultra Premium Full Synthetic 10W-30 Racing Motor Oil 1 Quart Bottle (946ml) K&N Full Synthetic Racing Oil is formulated with unique blend of additives with high Zinc and Phosphorous for extreme wear production. This unique additives are designed to increase performance, reduce friction and reduce sludge. More Information Extreme Wear Protection: Formulated with special blend of anti-wear zinc and phosphorous additives Cold Weather Start Up: Ultra-fast cold weather start-up protection Engine Protection: Improve thermal and oxidation stability helps protect against lubricant break-down Made in the USA