Acura 2008 TSX Owner's Manual page 245

Calculating Fuel Economy
Measuring Techniques
Direct calculation is the
recommended source of information
about your actual fuel economy.
Using frequency of fill-ups or taking
fuel gauge readings are NOT
accurate measures of fuel economy.
Fuel economy may improve over the
first several thousand miles.
Checking Your Fuel Economy
Gallons of
Miles driven
100
1) Fill the fuel tank until the nozzle automatically clicks off.
2) Reset trip counter to zero.
Record the total gallons (liters) needed to refill.
3)
4) Follow one of the simple calculations above.
Miles per
fuel Gallon
Liter Kilometers
Fuel Economy
L per 100 km
239