Review on AEM 28 20480 Dryflow Air Filter by Matt Crawford

I recently bought a used Mazda 6. The dealer I bought it from installed a new disposable aftermarket filter and in the two months since purchase my city and town average has been just a little over 31mpg. Motorway driving that is almost exactly what the car is designed for. Since getting this filter I've reset the overall average fuel economy and I'm now averaging almost 35mpg combined between city and highway. When I extrapolate that to the typical 30,000 miles I drive each year, that saves about 110 gallons of gas, which at $3 a gallon saves me $330 a year. In addition, I save on replacement because I no longer have to buy new filters and can only clean and use this one. This filter is not difficult.