Anyone out there see an realized gains from switching out the stock air filter to a permanent/washable filter such as a K&N? If so, what were they? Just curious...thanks

 

I have a banks air ram before I put it in I was getting about 12 mpg after I put it in I was at about 13.5 mpg then reprogrammed with the aev procal & get anywhere from 14.5 to 15 mpg

 

I noticed a 2 mpg gain on computer at first but faded quickly. Still a bit better though.

 

For my jeep (I'm a northeast wheeler, mind you), I use the stock airbox with inexpensive purolator air filters. Why? I'd rather throw in a fresh filter than have a secret part time job where I wash air filters.

I do believe in cleaning/oiling air filters on 2 strokes and similar powersports vehicles, regardless of region.

If I lived in a dryer climate, like Colorado, I'd change my filter more frequently or go with a dustbowl prefilter if i was overlanding (in the northeast anything beyond the A Pillar is a tree magnet), but I prefer the ease of maintenance of using paper disposable final filters.

 

Noticed almost no change to MPG or power. Haven't hooked it up to anything for testing, just seat of my pants and the vehicle MPG readout.

 

My thinking about a high flow performance air filter it that it should actually decrease the MPG, they are offered for performance I would think. A high flow air cleaner in my opinion allows more air to flow, the computer senses the more air (leaner mixture) so it richens the mixture by adding more fuel. This is where the performance comes from, but now you burning more fuel due to the higher flow rate of the filter.

 

Zero mpg gain....there are better ways to increase mpg.

 

Thanks for the replies. I didn't expect a tremendous gain in mpg, but I was curious to see what others had experienced.

Thanks again!

 

Any gain at all was worth it for me and will pay for itself in short order at $4. per gal. I run an Airaid and Superchips flashpaq in my 2dr auto and can get 20+ mpg.

 

Wouldn't the driver automatically respond to that by opening the throttle a little less?
After all, if the engine is getting more air/fuel than you want, you reduce the flow by closing the throttle a little.