The do-it-yourself oil change is a standard for many owner-operators, especially those with their own authority. A one-truck operator can save almost $200 a year by moving from gallon jugs to 55-gallon drums for oil purchases, assuming 125,000 miles per year with an oil change every 25,000 miles. A 10-truck fleet can save about $2,700 a year by changing from gallon jugs to bulk delivery in a tank.
