Check engine oil regularly, especially if you notice that the oil level drops between the oil changes. Engine oil cools down and lubricates the engine. Driving with very low oil level can cause engine problems. Park your vehicle on a level ground. Set the parking brake. Make sure the transmission is in "Park". Stop the engine. Wait for a minute or two to let engine oil drain into the oil pan. Pull the engine oil dipstick. If you don't know where it’s located, check your owner's manual, usually it has a bright handle saying "Engine Oil". Wipe the dipstick off. Insert it back fully. Pull it out again and check the oil level. The oil level...