Quote:
Originally Posted by dhymers
Call me a sucker but I actually believe K+N when they say its a high flow filter, enabling better "breathing"  (note I said I THINK it helps, no way I can be sure.)
Plus, I can clean it whenever I want, and I'm not putting paper/plastic/rubber etc.. in a land fill. I will never buy another air filter for the car again. Ever. |
What are you doing with the oil that you use to soak the cotton element? (Which also gets into your engine when you oversoak it.. potentially causing higher emissions.)
I mean, you have to wash the filter out, right? So you're letting that oil go down the drain?
Regarding the better breathing, if you're not driving over 50% throttle, it's not helping anything. They removed the improved MPG claim quite some time ago, because it was shown that they did NOT improve MPG (or airflow, in most cases) at anything near what the average person's driving would require. (IOW - they only work at WOT or close to it.) Remember, your throttle plate is the biggest single loss in your intake tract.
If you calculate how much air your stock filter will flow, then calculate how much airflow you actually NEED at a given RPM for full throttle, you'll often find that the OEM filter flows sufficient air for most situations at redline, and if you're capable of flowing more than the engine can take in, you're just wasting capacity.
Not to mention that at a couple bucks per paper filter, you'll never recover the money that you've already spent on the filter, let alone the money you'll continuously need to spend on the wash kits to keep the filter operating efficiently.