Harvest King Synthetic Motor Oil 10W-30 is a state-of-the-art, advanced technology, synthetic motor oil which provide the highest level of engine protection available, even under the most severe operating conditions. Exceeds domestic and import car light truck warranty requirements for all automotive gasoline engines currently in use where an SAE 10W-30 that meets API SM, SL or SJ and ILSAC GF-4 is specified. The 100% synthetic base oils in harvest King Full Synthetic SAE 10W-30 Motor Oil provide exceptional resistance to high temperature oxidation thickening. Our sophisticated additives prevent sludge formation commonly caused by moisture and combustion by-products. Exceptionally high viscosity index minimized cold weather oil thickening, which greatly reduces battery drain and engine wear, even at subzero start-ups.