Review on K&N Engine Air Filter: High Performance Replacement for 2017-2019 Hyundai/Kia L3/L4 Models, Washable & Premium Filter (Elanta, i30, Kona, Veloster, Cee d, Forte), 33-5050 by Trevor Blazis

I recently checked my car's fuel economy per gallon during a 10 hour trip to another state. I reset the consumption at startup. All divided highway. It's been a very windy drive, but my car's average mileage has gone from 19mpg to 21.5mpg over the years. When I came back I installed this K&N air filter. (I didn't reset) I noticed better engine response, but to my surprise, my average mileage rose to 21.6mpg on mixed highway/city driving. Pretty impressive to get more mpg in mixed driving than 10 hours of freeway driving. I definitely sold myself on these air filters.