K&N and fuel economy

[JWoodyard]

Recently a friend who has a 2001 2500 DC added a K&N air filter. He says his HP increased noticeably but fuel economy went to pot, to the point that he went back to the original air filter. Has anyone else experienced anything similar?

 

[klenger]

K&N = more noise ... remove foot from go pedel?

 

[Extreme1]

I agree with klenger!

He is still testing the new power!

 

[ASchwartz]

I have over 30,000 miles on my K&N filter in a stock box. I noticed an increase in HP and MPG. I recently drilled holes in my stock box to increase the turbo whine. I have not had a problem, yet.

 

[EMDDIESEL]

It is impossible that more airflow will physically cause poor mileage, but as mentioned, he is probably driving the truck harder now since its faster and that would expaling the lesser MPG.

 

[Archive]

Originally posted by klenger

K&N = more noise ... remove foot from go pedel?

I would tend to agree with this... or his tests aren't very accurate.

 

[DNelson]

I recently went back to my K&N from a Fleetguard, and my mileage has gone up 1-2 mpg. Plus, I can hear my turbo again!

 

[JWoodyard]

Since he has gone back to stock air filter I think I will give his K&N a test over 2 or 3 tanks of fuel. The wife might object to the added turbo whine.

 

[R Anestis]

I want one

I wasn't aware that I could get a K&N to fit in the stock airbox. Where is a good place to get one and how much do they usually run?

Thanks, -Ron

 

[EMDDIESEL]

www.summitracing.com has them for around 60 bucks.

 

[Sky]

Ill sell you mine for 25 bucks, used it for 20k went to a Cone style K&N. Its in great shape. Let me kow if your interested.

 

[YA_TO_UPA]

I had the same experience with mileage drop with a k&n in the stock air box. I didn't change my diving style once it was installed either. Went back to the stock air filter after a couple of months of being disgusted with the dropping mileage. In fact my mileage has yet to get back to where it used to be prior to the k&n experience.

 

[ASchwartz]

I got mine at Autozone, formerly Chief Auto Parts. I believe it ran about $60 as well.