If you’re looking for an Infiniti SUV with good fuel economy, let’s start with the models that offer the best gas mileage. The 2023 QX50 is the most fuel-efficient model from Infiniti, with an EPA rating of 23 mpg in the city and 29 mpg on the highway. Not only is it the cheapest Infiniti SUV, starting at $40,300 MSRP, but it also has the lowest cost of driving. The different trims available for the QX50 may have slight variations in fuel efficiency, but the difference is not significant.

Coming in closely behind is the upgraded version, the 2023 QX55. While the price increases to a starting MSRP of $49,150, the fuel range only drops slightly, with a rating of 22 mpg in the city and 28 mpg on the highway. The QX55 is comparable to the QX50 in terms of gas mileage, with just a one mpg difference in each rating. So, if fuel efficiency is your top priority, the difference between these two models won’t be significant. You can choose the cheaper option and save some money, or opt for the nicer model without worrying too much about the fuel economy difference.