CAI vs. K&N air filter

[gwseabold2]

I have an 07 Double Cab SR5 5.7L and love my truck. I purchased a K&N filter a few months ago on a friend's recommendation that it would improve gas milage and power slightly . After reading some posts on here I have seen CAI's, as well.
Has anyone tried both and can give me some numbers to look over for increased gas milage? I know there is a HP increase which I am not concerned with because the 5.7 has enough power for my uses.
My goal is to exceed the 20mpg on the sticker. Currently at 18 - 19.

Thanks in advance,

by the way this is a cool site.

[Andres]

I installed a K&N air filter a couple days ago. Still haven't done too much driving so I can't really notice any difference yet. I was thinking on getting a CAI but after doing some research I just decided to keep the stock system (at least for now), which according to many people is already very efficient. You can find tons of posts on this topic but I haven't seen too many comments on the air filter though.

I am also very interested on the outcome of this post

[gwseabold2]

Thanks for the quick response. I have the K&N filter and it may have increased the mpg by 0.5, but I also have lightened the right foot in the last year of driving it to improve my milage. the 18 -19 has been in town too. I am taking a trip with it next week and am anxious to see if the filter helps on the highway.

[Andres]

I know the feeling I am gonna be doing a long drive on the 4 of July weekend so I am waiting to see any results as well. I would be interested on your future reports.

welcome to the site by the way

[steve coster]

I installed a K&N drop-in filter two days ago. I don't "feel" a difference (I did with my Corolla...) but I am curious about the milage. Seems like it makes more of a difference if you have done exhaust work; air system alone seems to be of little benefit. I drive in hill country, so I am hoping a couple of extra horses will make a difference in MPG; less down-shifting going uphill...

[Cyprex]

Remove the charcoal filter from the airbox lid. That and a K&N drop in, and you have just slightly below an aftermarket CAI.

Also add exhaust for more MPGs!

[Andres]

Originally Posted by Cyprex

Remove the charcoal filter from the airbox lid. That and a K&N drop in, and you have just slightly below an aftermarket CAI.

Also add exhaust for more MPGs!

lol thx to you I might be spending more money noooooooooooo!!!. Let's be realistic guys the mpg is just an excuse . I just bought an exhaust tip to kind of fool my brain but it did not work

[Mickey]

When you do 60mph on flat land I get 22.5mpg. That's above the sticker. Also by driving slower you will notice when you fill up your range will be over 400 miles on the computer.

[Deznutjob]

Aftermarket intakes allow more air thus demanding more fuel. It's not likely you will see better mileage from an intake as most are designed for performance. Just sayin fellas! I added a second 3" fender intake to my stock and there is a very noticable power increase!

[Cyprex]

Darn it Dez, no way im taking a dremel to my truck

[Deznutjob]

Originally Posted by Cyprex

Darn it Dez, no way im taking a dremel to my truck

Alright Cy, then let me do it!

[Mickey]

I'm getting 2.0+mpg above the sticker, so something is helping putting the mpg's in my tank....

[gwseabold2]

I have completed my trip and here are the numbers.
Speed: 65-69 and about 500 - 600 lbs of gear.
all mpg check by miles to gallons with a calculator.
1st fill-up Roanoke, VA 200 miles @18.6 mpg going up and down hills.
Fuel gauge @ a little over 1/2.
2nd fill up 300 miles @22.6 mpg flat to rolling hills all highway.
Fuel guage @ a little under 1/2
3rd fill up 350 miles @18.7 mpg 50 miles city and rest highway.
Fuel gauge @ 1/4

The wierd thing about the trip is that in Roanoke I couldn't find any gas stations that sold anything but the 10% ethanol blend and I got the best milage using it. I am currently @ a little over 1/2 after 230 miles on another tank of 10%. WTF I though I would get worse using 10% and ended up getting better milage. I will probably fill up tomorrow to find the milage for the last leg of the trip.

[Mickey]

I got the other way. With 10% my mpg went down.

[steve coster]

I posted yesterday under the charcoal filter mod thread - I'm getting 2 - 3 mpg better with the K&N replacement filter and charcoal filter removed.