Drop-in K&N Filter NOT CAI

[HialeahScience]

What are your opinions on it? I picked one up from Amazon cheap last week and dropped it in. My mpg on the street has ranged from 16.9 - 17.1. I'm not sure if it's harming my mpg or not. I dropped the regular one for this week to monitor it on the trip mpg calculator. I'm going on a road trip to Orlando and I plan on dropping it in again to see what kind of mpg I get.

What do you all think. I've used K&N in all my old mustangs, trans-ams and an SVT Contour I owned with no issues, but who really gives a rats ass about mpg when you're driving a pony car or sports sedan right? An SUV is a little different. I know some posts have been made on it but not much has been said.

 

[8086bruce]

I put a drop in k&n in mine about a year ago and have seen no gain or loss in mpg or power.

 

[chaz]

not much said? theres plenty of threads on it, heres just a few, how much more u need to know. http://www.toyota-4runner.org/general-discussions/87985-poor-gas-mileage-k-n-air-filter.html http://www.toyota-4runner.org/accessories/6555-k-n-air-filter.html http://www.toyota-4runner.org/4th-gen-t4rs/92504-gas-mileage-killed-after-k-n-install.html http://www.toyota-4runner.org/4th-gen-t4rs/79294-air-filter-question.html http://www.toyota-4runner.org/perfo...14801-truth-about-aftermarket-airfilters.html http://www.toyota-4runner.org/5th-gen-t4rs/65319-k-n-air-filter-available.html http://www.toyota-4runner.org/classic-t4rs/64717-k-n-filter.html http://www.toyota-4runner.org/4th-gen-t4rs/61790-air-filter.html http://www.toyota-4runner.org/perfo...t-superchargers-more/257-k-n-air-filters.html http://www.toyota-4runner.org/4th-gen-t4rs/42208-k-n-anyone.html http://www.toyota-4runner.org/3rd-gen-t4rs/28318-k-n-airfilter-does-work.html http://www.toyota-4runner.org/classic-t4rs/5351-k-n-drop-filter-93-v6-3-0l.html http://www.toyota-4runner.org/maint...oil-analysis-w-k-n-drop-air-filter-v-6-a.html http://www.toyota-4runner.org/acces...ls400/19500-k-and-n-filter-let-dirt-thru.html

 

[HialeahScience]

not much said? theres plenty of threads on it, heres just a few, how much more u need to know. http://www.toyota-4runner.org/general-discussions/87985-poor-gas-mileage-k-n-air-filter.html http://www.toyota-4runner.org/accessories/6555-k-n-air-filter.html http://www.toyota-4runner.org/4th-gen-t4rs/92504-gas-mileage-killed-after-k-n-install.html http://www.toyota-4runner.org/4th-gen-t4rs/79294-air-filter-question.html http://www.toyota-4runner.org/perfo...14801-truth-about-aftermarket-airfilters.html http://www.toyota-4runner.org/5th-gen-t4rs/65319-k-n-air-filter-available.html http://www.toyota-4runner.org/classic-t4rs/64717-k-n-filter.html http://www.toyota-4runner.org/4th-gen-t4rs/61790-air-filter.html http://www.toyota-4runner.org/perfo...t-superchargers-more/257-k-n-air-filters.html http://www.toyota-4runner.org/4th-gen-t4rs/42208-k-n-anyone.html http://www.toyota-4runner.org/3rd-gen-t4rs/28318-k-n-airfilter-does-work.html http://www.toyota-4runner.org/classic-t4rs/5351-k-n-drop-filter-93-v6-3-0l.html http://www.toyota-4runner.org/maint...oil-analysis-w-k-n-drop-air-filter-v-6-a.html http://www.toyota-4runner.org/acces...even if you were being sarcastic about it. :)

 

[ridefast]

k&n will cause your throttle body to get oil from the filter on it and then cause dirt to stick to the oil on the throttle body.

When I bought a brand new tacoma back in 03 I stopped at auto zone and picked up a k&n, and when I went to clean it a year later my dad told me to check the throttle body and it looked horrible. I went back to a paper filter untill I bought a AFE PRO DRY S.
I got mine for $52.00 from afe when i called afe direct!
http://afepower.com/

 

[progress4m]

After doing some research and not wanting “oiled” air filter I went with AFE dry filter as per my post: http://www.toyota-4runner.org/4th-gen-t4rs/93701-afe-pro-dry-s-air-filter-v8.html
One thing I did, prior to ordering that filter is I ran my 4Runner without air filter at all for one week…
I have put around 150 miles during that week and changed my oil on the end of the week (as I always do at 4 to 4.5 K mark), so I am sure no harm was done. I was watching my gas mileage very closely before and especially during that week.
I know that 150 miles is not enough to make any kind of conclusions, but to my surprise my gas mileage went up from 18.9 to 20.1 ( computer readout). This is for 30% highway and 70% street daily work commute.
So maybe there is actually truth to better gas mileage with less restrictive filter… time will tell..

 

[PaulB-2006 T4R]

k&n will cause your throttle body to get oil from the filter on it and then cause dirt to stick to the oil on the throttle body.

When I bought a brand new tacoma back in 03 I stopped at auto zone and picked up a k&n, and when I went to clean it a year later my dad told me to check the throttle body and it looked horrible. I went back to a paper filter untill I bought a AFE PRO DRY S.
I got mine for $52.00 from afe when i called afe direct!
aFePower.com

...only if you over oil the filter but if the mass air flow sensor or throttle body does get dirty then shoot it with a little CRC cleaner.

 

[Nuke]

I think drop-ins are useless unless you're counting pennies with regard to replacement paper filters over the life of the vehicle. And over-oiling is a common and PITA issue. IMO, they do nothing for fuel mileage let alone performance. And trying to tell if they DO improve fuel mileage is useless. Unless you're using fuel from the SAME BATCH (not just from the same station) to do your comparison's, your data will be skewed. And ethanol content is only ONE of a number of variables which we have little to no control over that impact your average fuel mileage.

 

[HialeahScience]

good info ty guys

 

[ur7x]

I think drop-ins are useless unless you're counting pennies with regard to replacement paper filters over the life of the vehicle. And over-oiling is a common and PITA issue. IMO, they do nothing for fuel mileage let alone performance. And trying to tell if they DO improve fuel mileage is useless. Unless you're using fuel from the SAME BATCH (not just from the same station) to do your comparison's, your data will be skewed. And ethanol content is only ONE of a number of variables which we have little to no control over that impact your average fuel mileage.

I agree, my days of buying K&N filters are long since over. I have used them on EFI and carburated cars and trucks for years/decades and have NEVER experienced any improvement in performance and have never experienced any change in mileage. IMO... they are not worth it.

I have to also add that I have not experienced any of the "dirt/oil" problems either with a K&N filter. My DD car has almost 200,000 miles on a K&N filter... zero issues with dirt in the oil, dirt in the TB, oil in the MAF, etc.

While I would never buy another... I'm not convinced that the dirt/oil scare tactics are all that real either.

 

[chaz]

im not sure i believe in the dirty oil thing,never had any trouble with a drop in wet filter but i do believe that sometimes a wet filter on a so called aftermarket cai can cause sensor fouling. in my case 2 months after installing a brand new one on my 4r i had the problem, cleaned the sensor & it was fine for another 2 months till it happened again, this time after cleaning i switched to a dry filter & have had no problems since. it was not the first vec. of mine this happened on, so imo, if you like to play it safe, even with just a drop in, a dry filter is a better way to go. sorry to the OP, i didnt mean to sound sarcastic, only said something since certain things are posted over & over again through out the years & i knew there were alot of threads on this one. :cheers:

 

[Jerrydog]

I went form 18.6 to 20.6 when I took out the carbon filter and replaced the paper with a K and N. I did the math for gas milage mechanically and its coming out 19.8 or so on my last tank. I never did the math the old fashion way before the change. As for oil, after you wash it and let it dry you dont have to soak it with oil, just a light coat, I ran my pathfinder for 300k miles with a cone style K and N with no throttle body or mass air sensor trouble.

 

[HialeahScience]

im not sure i believe in the dirty oil thing,never had any trouble with a drop in wet filter but i do believe that sometimes a wet filter on a so called aftermarket cai can cause sensor fouling. in my case 2 months after installing a brand new one on my 4r i had the problem, cleaned the sensor & it was fine for another 2 months till it happened again, this time after cleaning i switched to a dry filter & have had no problems since. it was not the first vec. of mine this happened on, so imo, if you like to play it safe, even with just a drop in, a dry filter is a better way to go. sorry to the OP, i didnt mean to sound sarcastic, only said something since certain things are posted over & over again through out the years & i knew there were alot of threads on this one. :cheers:

TY for the advice mate :guitar3: no offense taken

 

[97BlackAckCL]

I took out the carbon piece when I put in my k&n filter, and I notic increased throttle response. Not really much change in gas mileage though

 

[madmac]

K&N used my 03' V8 Sport for testing and mock up, got a new FIPK kit for free. Been installed since 04'. Didn't do squat for increased mileage but did make the motor sound healthier. Have never had a lick of trouble with it.