Today we're going to take a look at the Flex-A-Lite heavy duty engine oil or transmission oil cooler. This heavy duty oil cooler can be used for engine oil cooling or transmission oil cooling. Your engine functions at its best when the engine oil is between 180 and 200 degrees. Engine oil will act as a coolant as well as a lubricant, so what happens if your oil gets too hot the horsepower will… see more >