These samples come from the round robin titled, “Committee D2 Proficiency Testing Program #6 Fuel Oil”. The mean values of each set of samples in the round robin were used to calculate the true values ...

Every dipstick knows an oil change every few thousand miles is a routine way of prolonging the engine life on your car or truck. But doing so produces an estimated 8 billion gallons of used motor oil.

Billions of gallons of motor oil are drained from engine crankcases each year, and only some of it is reused. Much of it is simply thrown away or burned. But that old oil could find new life as ...

Bodeit compares checking oil samples to having human blood checked for cholesterol. "We can see if there is metal, fuel or other contaminates in the oil," she added.