Who said anything about a cold air intake??
I paid ~$60 for the K&N. If the mileage went from 20 to 21 mpg average (highway) that's 20/21 = ~5% better. I fill up when the tank is fairly low each week and it takes 15 gallons. 15 * 0.05 = 0.75 gallon less per week. I drive about 15,000 miles a year and the K&N has a lifetime warranty. 0.75 * 52 weeks = 39 gallons less per year at ~$2 gallon is $78 less per year.
What does a stock filter cost? $20? A difference of $40 between the two means I've got my money back in a little less than six months, and again, I don't need to change the stock filter 2-3 years from now. Just clean and re-oil the K&N.
I don't understand what you're trying to prove that stock filters are somehow better. But yes, if you put a dripping wet K&N oiled on the interior side, then you're going to have a problem with the MAF.
'66 VW 11-window Bus (Disks, injected, bags)
'12 Chevy Colorado 2WD (Truetrac) 3.7 Crew Cab
Last edited by Jadewombat; 03-27-2017 at 02:03 PM.