I notices after the first tankful the motor ran better as well as the milage improved about 1
932340
I tried this in a 2000 outback wiht 165K on it. This is our third car the one we use for bringing the dogs to the vet , running to the store in town. I notices after the first tankful the motor ran better as well as the milage improved about 1.5 miles per gallon.
3389684
These plus spark plugs, fuel filter, air filter, cam location sensors and ALL drive line fluids changed and greased along with all engine fluids changed on a 5.4 Tritan with 204K well maintained miles on it my fuel mileage has almost doubled.  For a 4 wheel drive 44 gallon fuel tank ford excursion that is quite impressive. Was getting around 500 miles on around 38 gallons of gas and just turned up over 800 miles since last fill up and fuel light hasn't come on yet! Power gain is incredible. Put it to the floor merging onto an interstate not paying attention to speed and had to brake at the end of ramp cause when I looked speed was 80 mph and had not hit overdrive gear yet at 3700 rpm.
1380863
i read other people's reviews on how performanced is improved and man...they were right! power and torque increased. after i purchased this i was inspired on the improvement that i went ahead and installed a flow master exhaust to finish the job. i'm loving it!
803721
Recieved capacitor quickly and it was stronger than the one it replaced, which helped improve the a/c fan motor starting issue.
4440511
This is one of the few additives I have purchased that actually seems to live up to the claims.  I have a 2006 f350 with the 6.0 diesel and about 260,000 miles, and although the engine seems to be running fine, it was averaging about 11 to 11.5 mpg before I added the stiction eliminator to it for the second time.  This time, the fuel mileage actually improved almost 1 mpg, which doesn't seem like much, but actually adds up over time, especially with the rising price of fuel.  The engine runs a little quieter and seems to be idling a little smoother.  It's a little pricey, but I believe it delivers as advertised.  Thinking about adding cetane improver now and see if that helps with the fuel mileage.
2363884
Added 1 qt to first oil change at 5,000 miles on new Frontier 4.0 L engine with Mobil1 and I did notice significant noise reduction on lifter during cold start.
3448151
What a difference it made to my truck, starts easier, idles smoother, and power is more available with little lag.
2162244
I was surprised by the improvement.  I bought a lifted 2006 Ram 2500 4x4 diesel 6 months ago.  The steering wasn't great but got worse since.  One mechanic told me the ball joints were bad.  Then my tire guy did a quick check and said biggest problem was the steering gear. My tie rods are firm, lower ball joints firm, upper ball joints just slight wear.  I had intentions on changing the steering gear and adding the stabilizer this weekend.  After checking the gear myself I decided to first try the stabilizer. My steering gear had very little wear.  Glad I did. I could tell the difference pulling out of the drive way.  I do still have some play, but it is much improved.  My exam did show the drag link ends had some wiggle. I will change those next.
1337835
The product arrived quicker than expected.  After putting in in my fuel tank and driving for 15 or 20 miles I could already hear a difference in the sound of the engine.  It ran smoother and was quieter.  I plan to purchase more and run another can in it then start using it every 8 or 10 thousand miles.
3286846
I was looking to update the performance on my 2001 Ford ranger 4cyl XLT. Hubba, hubba , what a difference. Not hard to install, took some time with the directions but everything was as expected. Me being overly impatient. performance has improved. It worked out so well I purchased a new muffler system to compliment the intake. Thanks
1643539
More HP and saving more gas, getting great miliage
1227364
On a recent OBD2 scan, it showed a bad MAF.  Didn't realize how much of a difference a new one made until I replaced it.  Noticeable power increase with same or slightly better fuel efficiency.  A simple 2 minute job on my 2006 Jetta TDI (A5 BRM).
3449074
Originally i was confused about the horsepower rating but am pleased with the performance of the pump. It was retrofitted to a Chinese hot tub and it appears much better quality of the original version. The price was also cheaper and should last longer. Pleased with my purchase so far.
2586775
"Update:  after 23K km,  I feel the engine is now running more powerfully,  smoother and quieter than when the K&N filter was first installed.  I am not going to say online how fast my car is but suffice to say that the performance increase is similar to bumping up the engine another 100 or 200 cc.

Because  I use Mobil 1 synthetic oil, mechanically the engine is perfect, basically in the same condition 23K km ago and my engine is like new.  Fuel economy may be a tad better than with the stock paper air filter, but it is the engine improvement that makes this filter replacement well worth it." End of update

Installed this K&N air filter on my 2006 Mazda 3 GT 2.3 with 88K kilometers.

The reason I replaced the air filter was because I noticed my exhaust pipe was sooty and gas mileage seemed a bit lower than before.  Having used K&N air filters on my motorcycles, I decided to try them on my car.

First thing I noticed was an immediate but slight improvement in throttle response as hesitation was reduced.

After a tank of gas, the engine ran much smoother and throttle response surprisingly got much better, even better than when the car was new, if I remember correctly.  Engine was really smooth and quiet going through the gears and specially at highway speeds between 55 and 75 mph.

 Engine delivered instant power and acceleration when I stomp on the pedal, to overtake (at any speed).

I haven't noticed any improvement in fuel economy yet, perhaps because I am enjoying the newly found performance and now have to admit to a more enthusiastic driving style.

I am very happy I installed this K&N filter, It's $40 well spent.
1152333
MY TRUCK START BETTER NOW WITH FRESH FIRE IN THE SPARK PLUGS AND GET BETTER GAS MILEAGE I GET ABOUT 2 MORE MILES TO THE GAL.PER MILE
3266638
So far so good
I can say i got increase in horse power or fuel economy but its worth the money for the life time warranty
4488184
I had bought a used 2002 PT Cruiser with about 35,000 miles on it as a daily driver and to haul stuff around in the back.  Good car, but the engine was kind of coarse & a little noisy, which was a common complaint with them.  Gas mileage was so-so, another common complaint.  Throughout the next year, I got used to the car being that way.

After seeing a demonstration of MotorKote (using the Timken test for friction) at Summit Racing in Tallmadge, OH, I decided to give it a shot.  Within the first 20 miles of that oil change, the engine started to smoothen out.  By 100 miles, I was hearing a different noise from the usual engine growl at freeway speeds... It was the TIRE tread noise!  I'd never heard the tires on the pavement before, because the engine noise covered it up!  The engine became (and stayed) amazingly quiet and smooth.  Gas mileage improved about 2 mpg, and stayed that way.

Let the naysayers say what they like.  It worked for me.  By the way, you don't add MotorKote at every oil change... only every 4th one.  Instead of listening to everyone else's "blah, blah, blah" about this, I'd suggest you check out MotorKote's website, and ALSO look up the Timken (as in Timken Bearings) friction test for lubricants.  It's legit... I checked.