Gained 1+ mpg City and almost 2+ mpg highway.

[Avee8tor]

I know this may not seem much but for a vehicle that used to get only 17 it soon adds up. Also finding better driving experience.

Replaced the stock air filter with a K&N and now always drive in Sport mode BUT select 2H not 4A which it defaults to. Yes it won't change to 10th gear below 60-65 and has a higher cruise RPM but doesn't Labor when more power needed like an incline, standard will add boost and not change down.

2023 with SPP / HD tow etc.

 

[balthisar]

Change to percentages, and your "may not seem much" is completely wrong! A 5.9% city and 11.8% highway improvement is significant! Kudos, and good job!

 

[SyndicateZ]

When Ford says you should be getting about 17mpg city, does that include with only auto stop/start ON always?

 

[Fastcar]

I appreciate your efforts and info. Although I don't buy into the k$n filter playing a role in an mpg increase.

 

[SyndicateZ]

Normally , a higher flowing air filter only would increase the fuel ratio in an engine creating more HP but at the same time decreasing fuel economy a bit as well.

Thats atleast my understanding.

I run a K&N in my mustang and a AEM dry flow in the expy and Mileage is the same if not worse , especially in the mustang lol

 

[Left Coast Geek]

Normally , a higher flowing air filter only would increase the fuel ratio in an engine creating more HP but at the same time decreasing fuel economy a bit as well.

Thats atleast my understanding.

the Oxygen sensors completely eliminate any such changes, they ensure the fuel air mixture is correct under all running conditions.

 

[Deadman]

If nothing else you will save enough gas money to replace the engine after the K&N dusts it.
Hold the K&N up to a light, you can see right thru them.....Dirt also goes right thru and into your engine.

 

[GaryH]

I used to think K&N filters were awesome until I watched Project Farm test different brands. Now I'm back to using Purolator.

Which Car Air Filter is Best? Let's find out! Fram, K&N, Wix, Purolator, & AC Delco showdown

Best car air filter showdown: Fram Extra Guard, K&N Performance, Purolator, Wix, AC Delco, and EP Auto. Performance testing: filtering particles 5 microns an...

www.youtube.com

 

[Fastcar]

Back in the day I use to play with Corvettes and other high performance cars. I learned this. There are engineers employed by the auto industry who are charged with draging every last horsepower out of an engine. Some here will remember the horsepower wars between the auto makers. I am not aware of one that used a K&N. That sorta tells me that some of the HP and mileage claims are just that, claims.
That wooshing noise you here isn't horsepower, it is your money being sucked out of your wallet.

 

[duneslider]

I ran k&N's right on the carbs on my banshee and they absolutely were better at flowing air, they absolutely let sand and dust through too but it was worth it to be the fastest up the hill We were putting top ends in pretty regularly though...but that may or may not have had anything to do with the k&N's.

All the other sand toys got oiled foam filters.

I thought someone a while back talked about running in tow mode and getting better mileage too.