I don't trust washing to remove the small particulate that truly harms an engine and/or cuts down on flow rates in a filter year after year when you get it wet, etc. It's also very fast for me to just change out the filter, and I'm more about my time. Oilable filters are the worst, though. My favorites are replaceable synthetics like the Cosworth filters, although I don't think they make them for the CX5.
If the "small particulate" that is stuck on the filter, doesn't get washed off when I wash the filter, wouldn't it still stay stuck on the filter when I put the filter back on the car? It won't all of a sudden be able to go through the filter and into the engine. Anyway, if you wash it correctly, dirt will never get to the clean side of the filter that faces the throttle body.
I agree, time is money. The faster you can change the air filter, the better. In my case, it takes me the same amount of time to remove the AEM filter and replace it with the OEM filter. True, I lose some time, maybe 10 minutes washing the AEM filter, but i'm also saving money since I didn't buy a new OEM filter. I spend some more time again, putting back the clean AEM filter. The question then becomes, is the time spent removing, washing/cleaning and putting back the AEM filter, worth the price of a new OEM filter? The answer is totally relative to how you want to spend your time and money.
By the way, the AEM dry-flow filter doesn't need to be oiled.
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