Quality Protection, Dependable Performance Harvest King – since 1951. A proven brand for over 65 years, Harvest King® offers a wide-range of oils, fluids and lubricants that protect today and tomorrow’s automotive and agricultural vehicles and equipment. Our solid heritage ensures we provide hard-working, trustworthy, and functional products while keeping the utmost quality in mind. Harvest King® products deliver dependable performance at a fair price for a variety of automotive and agricultural needs. The Harvest King® line includes a full range of motor oils, specialty oils, fluids, lubricants, greases, and grease guns for automotive and agricultural application. Harvest King® products are hard-working and provide dependable performance under a variety of conditions. These products help ensure your automotive and agricultural equipment is protected and maintained with high-quality products at a fair price.