Do the math: Your Lamborghini Aventador, one of the cars most guilty of gas-guzzling today, gets about 11 miles per gallon, and costs you around $3,109 a year in fuel, compared to $1,842 a year for the average 27 MPG-vehicle.

Wake up. You don't drive a Lamborghini. But here's another reality check: some popular SUVs that get around 22 MPG can cost as much as $2,000 a year in fuel, assuming 15,000 miles of driving annually and a price at the pump of $2.28, according to the EPA.

The first car on this list, the 2019 Hyundai Kona Electric, gets about 120 MPGe (electric equivalent) combined, and can save you about $1,592 a year in fuel (or electricity) costs compared with an SUV that gets 16 MPG. (We compared it to a 2019 Chevrolet Suburban K1500 4WD that drives on regular gas using fueleconomy.gov's costs and savings calculator.) That's $15,920 over 10 years, money that could be growing in your kid's college fund or your retirement account.

So if you're in the market for a new SUV, price of a vehicle matters, but remember the cost of fuel, too, and what it's doing to your retirement.

Based on the EPA's estimates of SUVs at fueleconomy.gov, these are the 2019 SUVs that cost the least to drive.