Honda 2008 Ridgeline Owner's Manual page 193

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
fuel
100 Liter
1. Fill the fuel tank until the nozzle automatically clicks off.
2. Reset trip counter to zero.
3. Record the total gallons (liters) needed to refill.
4. Follow one of the simple calculations above.
Fuel Economy
Miles per
Gallon
Kilometers
L per 100 km
187