You're too stubborn BD, them Wix and Napa Gold filters will do a fine job and save you a ton of money. Fleetfilter.com even has the cabin air filters, you may be able to go to the Wix site and find the correct part number, but they do list the size of each filter if you click on it.
http://www.fleetfilter.com/filters/wix-cabin-air-filters.htmlBD, you are going to worry yourself to death over nothing with that micron rating. It sounds good when one filter is rated at 20 microns, and another is rated at 10 microns, in reality the 20 micron filter will not pass 20 micron particles shortly after being run. As the filter starts cleaning, it starts blocking the 20 micron holes almost immediately. 20 microns is 0.000787 ", most bearing clearances are .00125" per side or even larger, and the bearing is floating in a cushion of oil, so in theory the particle from a 20 micron filter would never make contact with a bearing surface, it will just get squirted out the side and pass through the filter again, likely being trapped. There is way more harm done to the engine during start up and when filters reach the end of their life than there is harm done from the difference between a 10 micron filter and a 20 micron filter. Filters have bypass valves which open up when the engine is first cranked and the oil is cold, as the oil cannot all pass through the filter because of it's thicker viscosity. As the filters become clogged the bypass can also open up because the oil cannot pass through the dirty filter. In fact a good bypass valve can be just as important as the filter itself.
My troubles are over Sam. Amsoil carries a fuel filters for my big tractor so I don't have to worry any more. I even found a oil filter for it to. I agree with you about a filter stopping up. That's why I'm so glad to see that Amsoil had one for that tractor. They have more filter media so they perform better and are rated for 25,000 miles or one year. If I'm going to do my best to protect my engine with the best oil on the market I don't see any reason to not do the same with the oil filter. I only need one per year for each machine.BD, you are going to worry yourself to death over nothing with that micron rating. It sounds good when one filter is rated at 20 microns, and another is rated at 10 microns, in reality the 20 micron filter will not pass 20 micron particles shortly after being run. As the filter starts cleaning, it starts blocking the 20 micron holes almost immediately. 20 microns is 0.000787 ", most bearing clearances are .00125" per side or even larger, and the bearing is floating in a cushion of oil, so in theory the particle from a 20 micron filter would never make contact with a bearing surface, it will just get squirted out the side and pass through the filter again, likely being trapped. There is way more harm done to the engine during start up and when filters reach the end of their life than there is harm done from the difference between a 10 micron filter and a 20 micron filter. Filters have bypass valves which open up when the engine is first cranked and the oil is cold, as the oil cannot all pass through the filter because of it's thicker viscosity. As the filters become clogged the bypass can also open up because the oil cannot pass through the dirty filter. In fact a good bypass valve can be just as important as the filter itself.
Doesn't make any sense, if anything the 15 micron filter should last longer. The micron rating is the hole size in the media, smaller whole means less area for fuel to pass through. The 10 micron filter must have had more pleats, thus a larger area, so it would last longer before it packed up.
They will pass a little dirt. The reason they are used on dirt bikes and such is, they are subjected to water, and paper elements and water don't go well together at all.
The diesels truck guys bash the K&N pretty hard on the diesel truck forums. I don't know, because I have never tried one on a diesel. I've got a Hemi.
K&N has always been a "Performance" filter, as in more horsepower, they have never claimed to filter better to my knowledge. Their other big selling feature is that they are "Reusable". You would have a tough time winning a lawsuit against them for passing more dirt.
