A large municipality in the northwestern United States operates over 1,700 vehicles and over 3,000 pieces of motorized equipment ranging from riding lawn mowers to bulldozers.

Oil changes constitute a major expense. For example, the 500 heavy duty trucks in its fleet previously had their oil changed every 2,500 miles at a cost of around $400 per change. Assuming that each truck is driven 40,000 miles per year, total oil changes on these vehicles alone cost over $3 million per year. By using oil analysis to track oil condition, the City now performs oil changes only when necessary and has reduced their total oil change costs for these vehicles to below $1 million per year. Substantial savings have also been achieved on other types of vehicles and equipment.

Furthermore, the City has achieved considerable but unmeasurable savings by identifying serious problems in oil analysis and fixing them before they cause a catastrophic failure.