My car is officially 2 yrs old and not a thing has been wrong with it until now. All of a sudden my AVG MPG gauge decreases as I drive. I started the car this morning and it said 15.5 mpg...then it set for about 15 minutes when I had to make a quick run to the store and it read 13.3 then 12.9...

After installing the K &N air filter within the stock filter housing getting better mileage. I also get better performance. So happy with the filter change I installed a K & N in the wife's Forte SE ;)