Investigating technologies such as lubricants that will improve the efficiency of today’s vehicles is essential, as most vehicles are on the road for more than 15 years before they are retired. The Vehicle Technologies Office (VTO) supports research and development (R&D) on lubricants that can improve the efficiency of vehicles with internal combustion engines. Because 11.5 percent of fuel energy is consumed by engine friction, improving lubricants enough to result in a 1 percent fuel savings in the existing vehicle fleet could save more than 90 thousand barrels of oil a day.

Research that the Vehicle Technologies Office supports includes: