Some aftermarket fuel-economy product claims do not always live up to hype

Some operational myths don't apply either

Windsor Police Service in Ontario, Canada tested for themselves w/ University of Windsor assistance

Testing and analysis took about 1,200 hours over a 2-year period

Presented findings at NAFA Institute & Expo in Detroit

Maintaining proper tire inflation proved to be most critical

Older spark plugs or clogged air filters don't drastically reduce fuel economy

Vehicle's onboard electronic systems adjusted for plug and filter changes

Aftermarket fuel-line catalyst claiming 1 - 2.5 mpg improvement made no difference