Getting away from the philosophy and politics and more into practical considerations, I’d make a few suggestions:
First, when comparing vehicles, use fuel consumption rather than mileage. Mileage is very misleading. For example, if I asked you which is better - going from 15 to 24 mpg or going from 25 to 50 mpg, a lot of people would say the latter. The first is only 9 mpg better, and the second is 25, right? Not so fast:
A car that gets 15 mpg will burn 6.67 gallons every 100 miles.
A car that gets 24 mpg will burn 4.16 gallons every 100 miles.
Chosing car 2 over car 1 will save you 2.51 gallons every 100 miles.
A car that gets 25 mpg will burn 4 gallons every 100 miles.
A car that get 50 mpg will burn 2 gallons every 100 miles
The difference in the second group is only 2 gallons, where in the first it’s 2.51. The key takeaway from that is that the big savings are had by avoiding the huge gas guzzling behemoths like the Escalade, Subiurban, Hummer H2, etc. There are diminishing returns as you compare two vehicles with already high fuel economy. For instance, the difference between 40 mpg and 50 mpg is only .5 gallons per hundred miles - in a typical 15,000 mile driving year, the first car will only burn 75 gallons more than the second - at $4/gal, that’s less than $30/mo difference. This would almost certainly make it uneconomical to trade in your current vehicle for a new one if improving gas mileage was your only goal, and would also make it uneconomical to pay more than a thousand dollars or so difference in price.
Canada uses proper measurements for fuel consumption.
Here’s a comprehensive chart of fuel consumption for every car made in Canada.
A Hyundai Santa Fe has pretty high fuel consumption - one of the worst in its class. Even with the small engine (which is a real dog in that vehicle), it burns 11.4L/100KM city, and 8.3L/100km highway. That’s because the Santa Fe is a very heavy vehicle for its class. If you’ve got the bigger engine and AWD, it burns 12.6/8.4
But you don’t have to squeeze yourself into an econobox to get a good improvement over that. A Honda CRV is in the same class of vehicle (it’s nicer, if you ask me, and has more utility), and it does 10.3/7.3. In comparison, the Pontiac Vibe mentioned before does 8.2/6.3. So in highway driving, you’re only going to burn 1L/100km more in the CRV. There are 3.78 liters in a U.S. gallon.
So in a typical 20,000 km year, the CRV would only burn 200L more than the Vibe if driven on the highway, or 420L more if driven in the city. Split the difference in half, and you’re looking at an annual difference of 310L, or 82 gallons of gas. At current gas prices, the vibe would only save you $27/mo in gas.
BTW, a Jeep Grand Cherokee FFV (flex fuel), which is advertised as a ‘green’ vehicle because it can burn E85, burns a whopping 21.1L/100km in the city. At current gas prices in Canada, it would cost $5570/yr to gas that thing up. Those are the kinds of vehicles you really want to avoid. BUt once you get up into the 20s and 30s for fuel economy, the differences in a few mpg are very slight, and other utilitarian considerations become more important. Keep that in mind.
It always pays to run the numbers so you can make smart decisions.