Mine does well on the highway, city driving I'll only get a bit over 300 km to a tank, however, I only let my tank get to 1/4 before filling it.. It works the pump too hard. Since my blower install, it has only gone down a bit, providing I'm not on the boost.

I haven't noticed much difference in the CA/US gas.

I feel the number 1 thing is how you drive and AC
My last trip to the States was through KY/OH/MI where the speed limits are either 65 or 70 MPH.

I go 120 KPH in 70 MPH zones
and 110-115 KPH in 65 zones

With the computer here's what I got;
120/AC on -> 9.1 L/100 kms
115/AC on -> 8.8 L/100 kms
120/AC off -> 8.6 L/100 kms
115/AC off -> 8.0 L/100 kms

I had the AC on, on the way down and it off on the way back so the distance was decent enough to get a fairly accurate estimate.

The distance left is totally dependent on the milage and calculates it on the fly. I fill up at the border after driving on the highway the whole trip. When full it reads about 580-590 kms till empty since it's initially based on my highway milage. But after a bit of city driving that number drops in a hurry since my city milage is anywhere from 13-14.5 L/100 kms.

In Canada on the 4 lane highways I drive a shade under 120, in the US I drive about 8-9 MPH over the posted speed limit, in a group even higher sometimes.

All my mileage calculations are done on a sheet which coverts it all to imperial Gallons and miles, no formula errors either, it just seems weird?

AC is not a factor but top down does make a slight difference.

Can. = 25-(27.5 very best)
US = 29

this is slightly off topic but fuel in bc,chevron to be specific.they have 92 octane with no ethanol and i got 28 ,pg in the mountains....once i hit the bald prairie and i converted to shell v poweri got just over 22.I wasnt hindered by the wind factor in sask either ....maybe a mild breeze but not a 6 mpg breeze

Contrary to what tree huggers would like you to believe Ethanol has less energy than gasoline and reduces your mileage.. :banghead:

Yup...they don't advertise that stat or it takes 6 times the amount of energy to get one gallon of ethanol vs one gallon of gas .... When I get up beside a hybrid I rev ER to 6 grand and dump it....

All my Ponies except the latest one have all gotten over 30mpg in Canada or the USA=nice

Just got thinking, the possible solution is that there is less ethanol concentration in the US gasoline than in Canada? Although, there is a gasoline depot where I live and half the tankers picking up gas are US bound to sell Canadian gas at US stations cheaper than it sells for in Canada?:?