K&N Air Filters - Worth the Money?

[GasSavers_Erik]

I did a T test at http://www.graphpad.com/quickcalcs/ttest1.cfm

The result was no significant difference between OEM and K&N at the 95% confidence interval. But then again- the sample sizes are tiny.

Results below:

Paired t test results
P value and statistical significance:
The two-tailed P value equals 0.0577
By conventional criteria, this difference is considered to be not quite statistically significant.

Confidence interval:
The mean of KN minus OEM equals -0.5500
95% confidence interval of this difference: From -1.1853 to 0.0853

Intermediate values used in calculations:
t = 11.0000
df = 1
standard error of difference = 0.050

Learn more:

GraphPad's web site includes portions of the manual for GraphPad Prism that can help you learn statistics. First, review the meaning of P values and confidence intervals. Next check whether you chose an appropriate test. Then learn how to interpret results from an unpaired or paired t test. These links include GraphPad's popular analysis checklists.

Review your data:
Group KN OEM
Mean 70.6750 71.1750
SD 0.2784 0.0354
SEM 0.1392 0.0250
N 4 2

[dkjones96]

You can't argue with that ping pong ball display unit K&N has though. lol

[Jay2TheRescue]

Well, if I ever have the need to put ping pong balls in my air intake I will make sure to put a K&N filter on the vehicle first...

[GasSavers_GasUser]

Originally Posted by Jay2TheRescue

Well, if I ever have the need to put ping pong balls in my air intake I will make sure to put a K&N filter on the vehicle first...

LOL........why not......don't you want a car with balls??......LOL

[GasSavers_GasUser]

^^^ ok....sorry I got a little OT.

After reading all that stuff, I don't feel good about useing any of the aftermarket air filters, K&N included so I don't think they are worth the money.......I am just useing the standard paper OEM type ones.

[Jay2TheRescue]

The paper ones last so long now. I replaced the paper one on my truck this summer, not because of mileage (~45,000 miles) or because the indicator was showing it was worn out (the air pressure indicator was still showing it was good), but because it was 4 years old and it was only $15 to replace.

-Jay

[GasSavers_GasUser]

Originally Posted by Jay2TheRescue

The paper ones last so long now. I replaced the paper one on my truck this summer, not because of mileage (~45,000 miles) or because the indicator was showing it was worn out (the air pressure indicator was still showing it was good), but because it was 4 years old and it was only $15 to replace.

-Jay

Yea, I agree and unless you are driving in the desert and dusty conditions there on dirt roads and such, they do seem to last a long time.

[dkjones96]

Out of curiosity, how did this thread end up under Automatic Transmissions?

[Jay2TheRescue]

Good point. I moved it to a more appropriate forum.

-Jay

[R.I.D.E.]

I read a report about using K&N in heavy equipment in very dusty conditions. A significant increase in engine failures.

Stock works fine for me.

regards
gary