Fuel consumption from a weekend trip - 2008 Honda Odyssey, no a/c, winter tires, 2 passengers.
Newmarket ON to Lavaltrie QC .- 628 kms, 64.4 litres = 10.2 litres/100km (cruise at 115 kph)
Lavaltrie QC to Jonquiere OC - 458 kms, 51.1 litres = 11.1 litres/100 km (cruise between 80 and 110 kph)
Jonquiere QC to Ingleside ON - 614 kms, 64.2 litres = 10.4 litres/100 km (cruise at 115 kph)
Ingleside ON to Newmarket ON - 429.7 kms, 45 litres = 10.4 litres/100 km (cruise at 115 kph)
All in, 2130 kms, 224 litres for a total average of 10.54 litres/100 kms.
Also, over this distance, the GPS measured .3km farther than the vehicle odometer.