It's the starting and stopping that kills my mileage. I rode up to Niagra a couple weeks ago, I was astonished at the mileage I was getting on the 401, I was at 290km, with 75 still showing left, big difference on the highway, we weren't in a rush, so we were cruising from 100-115km/hr. mind you, it dipped considerably riding through GTA at 3:00pm on a Friday. At least now my wife is willing to endure 3 mins of discomfort on the steel bridge at thousand islands to ride through the states to get there, than 3 hours of putting up with GTA gridlock.