It is best to rely on oil analysis to establish your oil change interval. Of course, on many smaller vehicles that only take 4-6 quarts of motor oil, the price of the oil analysis can be nearly as much as a complete oil change.
It is wise to utilize professional oil analysis services in order to determine what your oil change intervals should really be. However, at a cost approaching that of a 5 quart oil change, this isn’t always a cost effective solution for passenger car owner.
