AFE is the way to go. Great stuff. 18k miles and no prob.
snowman
ps. snowing here... yee haww!

 

read this.
http://home.usadatanet.net/~jbplock/ISO5011/SPICER.htm

 

Looks like K&N's in the lead there.

 

How many additional miles per gallon could using an aftermarket filter such as K and N or Amsoil provide? I am at 13.3 mpg right now and am wanting to do whatever I can to get this truck up to 17-18 mpg. I have seafoamed and am on the verge of replacing the fuel filter as well.

 

I doubt if any will give you any better mpg. Use the OEM they are made for your rig. Have you alway gotten that poor mpg? I would have the injectors cleaned by a shop pressure system and I would check your codes and see if you might have a bad O2 sensor. Good luck.

 

I had just bought a K&N drop in, then I see all these tests showing negative info on them. So I took it back, exchanged it for one of those AC Delcos (got it at O'Riely Auto Parts) highlighted in the above study, and pocketed the $40 cost difference. The fitment for the AC Delco was very good. When I change my oil next (July 1) I'll check out the condition of the oil...

 

Does anyone have any data on filtration and efficiancy on these two filters? Any increase in gas mileage? I have an Amsoil for my new '04 TRD Taco, but after looking @ the test results posted by evilcow here ,
tehttp://home.usadatanet.net/~jbplock/ISO5011/SPICER.htmsts
I'm starting to reconsider. I am going to deckplate the airbox, but if there's no significant bump in fuel economy with the Amsoil, I'd just as soon be feeding my engine the cleanest air possible. I plan on putting at least 200k on this truck, just like I did with the '93 I just sold. Also, any input on the best time to switch from dino to synthetic would be appreciated. The truck has about 750 miles on it. Thanks for all the great info so far guys.

 

Tacotex, To answer part of your question about when to switch to synthetic check out this page on the Amsoil site: Clicky

 

I've got a brand new amsoil filter for sale:
http://cgi.ebay.com/ebaymotors/ws/eB...e=STRK:MESE:IT
I'll have a lightly used K&N also for the 3.4L as soon as I pull it out and clean it. It'll come with a new "recharger kit" as well as a partially used one.

 

Hey, I'm the winner of that auction. What a coincedence.

 

K/N here. As long as you maintain the filter it'll last 1,000,000 miles. Oh wait that's what it says on the box.

 

To bad the engine won't last that long with a K&N filter on it. It will get sand blasted from the inside out. At least you can put the same filter on your new engine...

Gadget

 

That reminds me. I need to clean my K&N so I better go buy a cheapy stock one for my trip to Houston since I don't have time to clean it before I go. Thanks for the post that reminded me Gadget.

 

So I had considered a AmSoil filter for my runner, but after talking with my mechanic at Toyota of Escondido, I'm staying with the stock filter.

He told me that the mass air flow meter gets really dirty with aftermarket filters and can cause the engine to run either lean or rich because the MAF gets out of spec really easy.

He said if I get a AmSoil (not to get a K&N), I'll have to take the MAF apart every 5-7k miles and clean the MAF wire.

Nah, I'll keep my stock filter...

 

It's a wonder my old 3.0 lasted 200k with the fram oil filters and the K&N air filter I ran on it. I noticed some dirt behind the K&N I just removed from our 4runner, stuck to the face of the rubber airbox seal. That gasket is designed to seal against the smooth plastic frame of the oem filter, not the rubber on the aftermarket ones. If your gonna run aftermarket, it might help to help that seal with a little grease (like on a dirtbike). Wish the good info here had been available years ago. A wise old man once told me to "keep your Toyota ALL Toyota". Wish I'd have listened then

 

Bob is the oil guy did a "real world test" as he calls it. I am running a K&N and have had no trouble.

http://www.bobistheoilguy.com/airfilter/airtest1.htm

 

I think this conclusion of the filter study stated below speaks to what is really important. Too me it is the protection of the engine from dirt. A high performance filter can ruin your engine. Most of us care about the quality of oil we put in our Toyotas, if you do then putting a high performance filter on your Toyota that lets in more dirt you have canceled any positive effect you provided by going to a synthetic oil. Dirt kills the long term performance/reliablity of any engine.

"Well there is a clear pattern on filtration ability compared to both flow and the type of filtration media used. The "high performance" cotton gauze and foam filters do not filter as well as some have claimed. I actually received an e-mail from K&N stating their filters filter within 99% of the OEM filters. This may be true, and 1% may not sound like much. I contend that 1% over many miles, may be important. Really, it is up to each individual to decide. The poorer flowing filters, remove more particles, and the better flowing filters remove less particles. If you think about it, that conclusion passes any and all common sense tests, so it is not surprising. There are many that will be shocked by the results, that should not be though. I've used high performance filters in the past, and I might again in the future. At the same time, I know that the stock OEM type filters perform very well in filtration and don't inhibit flow nearly as much as some think."

 

Personally I value protection over power. There isn't much but mud at school, so my engine bay gets dirty! Do the math, you want something paper thin to get all the dirt out or do you want something 2"thich? I can't wait to get another amsoil back into my truck.

 

I just switched to high-flow cheese cloth because I want zero restrictions.

 

What kind of cheese does your exhaust smell like?