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K&N Air Filter. Improved MPG?

2762 Views 5 Replies 4 Participants Last post by  KonradL
Thinking of tossing a K&N Air Filter(s?) in the car, was wondering if anyone's had this done and if so, any improvements in anything or is it just a pointless mod. I had 'em on my last cars, and the main improvement was not having to ever have it replaced. Not sure if MB makes a good Air Filter from the Factory though.

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I would think Performance Products would be a good choice to find it.

When you are dropping in a K&N, remember that you won't really get full benefit unless you also open up your exhaust. Think of the engine as a big air pump. More air in quicker, more air out quicker. It will help but it will be incremental.

On a 93 500E I improved mileage by about 3.5MPG with Cold Air Induction and a Borla exhaust system. Since I had to replace the exhaust system anyway it was not a "replace for savings" type R&R.

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