Natural mineral oils, synthetics and blends, branded and unbranded… we’ve got a wide range of the best oils and greases at competitive prices. Not sure what you need? Put our six decades of experience to work selecting the right products. Farm and manufacturing equipment are a major investment for individuals and businesses. Maintaining them with high-quality oils and greases can maximize the return on that investment and prolong the life of the equipment. From farm equipment to cross-country 18-wheelers, to industrial equipment, Gresham Petroleum products will keep you running.