Most vehicle owners know surprisingly little about motor oil, a fact which is moderately surprising, given the prevalence of motor oil in our day to day lives. All internal combustion engines use motor oil, including cars, trucks, buses, motorcycles, go karts, snowmobiles, boats, tractors, construction equipment, aircrafts, and generators. It’s hardly surprising that Americans are major consumers of oil, producing about 1.3 billion gallons of used oil every year. Though most vehicle owners know that motor oil is important and that they should get an oil change every once in a while, most are quite unfamiliar with the standards associated…