Method of testing and proving fuel efficiency improvements

A method for testing and proving fuel efficiency improvements caused by a modification of at least one operating parameter in a vehicle, the method comprising:

• installing a telematic device in each of a first plurality of vehicles and in each of a second plurality of vehicles, each telematic device configured to receive fuel consumption data broadcast by a vehicle's engine control module;
• collecting baseline fuel consumption data for the first and second pluralities of vehicles during a first time period;
• modifying the at least one operating parameter in the second plurality of vehicles after the first time period and during a second time period while maintaining the at least one operating parameter the same in the first plurality of vehicles after the first time period and during the second time period;
• collecting test fuel consumption data for the first and second pluralities of vehicles during the second time period;
• and
• analyzing baseline fuel consumption data and test fuel consumption data for the first plurality of vehicles and the second plurality of vehicles to determine fuel efficiency improvements in the second plurality of vehicles caused by modifying the at least one operating parameter, the fuel efficiency improvements being determined by subtracting any modifications of the fuel consumption data for the first plurality of vehicles, acting as a control group, from any modifications of the fuel consumption data for the second plurality of vehicles during the second time period,
• wherein modifying the at least one operating parameter includes changing one or more vehicle lubricants used in the second plurality of vehicles.