Reviewed By JASON B (Akron, OH) Reviewed for a 2001 Hyundai Elantra —6/12/2008 7:03 AM
I checked my gas mileage after my first full tank of gas and my mileage increased by 3 or 4 miles per gallon. I hope this wasn't just a fluke. I recently purchased new tires also so it may be the combination of both. I'm sure the K&N Air Filter had something if not the most to do with it.