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ImportConvert · 02-22-2012, 12:23 PM

Just ordered Z1 post-maf hoses and K&N filters.

I have read the tests, and the K&N allows only 2% or so more crap in. If the OEM filter were within 2% of allowing enough contaminant in to destroy the motor, there would be issues. Everything has "design tolerance" and this falls easily inside that range. When I was in my 400 lvl statistics and research classes, they taught us about manipulating information via visual depiction, etc. Here is a perfect example:

Notice how the K&N is just shy of 97% efficient while the top filter listed is just shy of 100% efficient? A difference of THREE PERCENT is displayed graphically in a VERY slanted manner. Were this scale 0-100%, they would be a furry hair away from each other. Instead, the poster chose to use the top 4% of the 0-100% scale, and made the K&N graphic about 1/4 as large as the other. Very slanted, and I think it's a BS way of making your point.

This link explains the results of this man visiting K&N's facility 2 years later...
K&N air filter,,,,good or bad ????? - Page 3 - Nissan Frontier / Navara Forum

Having read this, it is obvious to me that Mr. Spicer is engaging in what I can "mental masturbation". It is fun, he has some data to back him, but in the end it is not going to bare any fruit of any import. 2-3% more dust is not going to lock your engine up and make the earth stop spinning. In fact, if you normally change your oil at 5K miles, and you then decide to change it at 4K miles instead, you will cut TWENTY PERCENT of the dust circulating in the oil. Not only that, but you will remove 20% of the time that that other 80% in the oil would have spent circulating. I wonder if Mr. Spicer uses 1,000 mile oil-change intervals on his street-driven vehicles?

02-22-2012, 12:23 PM	#79 (permalink)
ImportConvert A True Z Fanatic Join Date: Jun 2010 Location: SWMO Posts: 4,454 Drives: 2019 CX5 GT Reserve Rep Power: 7627	Just ordered Z1 post-maf hoses and K&N filters. I have read the tests, and the K&N allows only 2% or so more crap in. If the OEM filter were within 2% of allowing enough contaminant in to destroy the motor, there would be issues. Everything has "design tolerance" and this falls easily inside that range. When I was in my 400 lvl statistics and research classes, they taught us about manipulating information via visual depiction, etc. Here is a perfect example: Notice how the K&N is just shy of 97% efficient while the top filter listed is just shy of 100% efficient? A difference of THREE PERCENT is displayed graphically in a VERY slanted manner. Were this scale 0-100%, they would be a furry hair away from each other. Instead, the poster chose to use the top 4% of the 0-100% scale, and made the K&N graphic about 1/4 as large as the other. Very slanted, and I think it's a BS way of making your point. This link explains the results of this man visiting K&N's facility 2 years later... K&N air filter,,,,good or bad ????? - Page 3 - Nissan Frontier / Navara Forum Having read this, it is obvious to me that Mr. Spicer is engaging in what I can "mental masturbation". It is fun, he has some data to back him, but in the end it is not going to bare any fruit of any import. 2-3% more dust is not going to lock your engine up and make the earth stop spinning. In fact, if you normally change your oil at 5K miles, and you then decide to change it at 4K miles instead, you will cut TWENTY PERCENT of the dust circulating in the oil. Not only that, but you will remove 20% of the time that that other 80% in the oil would have spent circulating. I wonder if Mr. Spicer uses 1,000 mile oil-change intervals on his street-driven vehicles?