K&N Filters

[1stToyota]

Originally Posted by RedRide

Perhaps but, it isn't recomernded as the oil helps trap the smallest particles.

Oiling the filter (applying the correct amount) is not dificult at all.

The oil "problem" is simply a myth perpetuated by competing filter technology vendors.

As I said in another thread, Toyota offers a K&N type filter themselves so, they obviously have no problems with it. A TRD filter is made exactly like the K&N and may even be made by K&N.

Unless the myths are based in fact; some certainly have to be. For example: customer with Avalon pulls in with engine performance issue and MIL on, checked code and data stream, needed at least 80% calculated engine load @ WOT, was way below that spec, MAF heated wires and temp probe were gunked up with sludged, cleaned MAF meter and installed WIX filter, cleared code and let customer test drive his car. He couldn't believe the new throttle response and wanted to know what I did...told him I removed his K&N filter that he said was just installed, and they come pre-oiled so if it was over-oiled it was done so at the factory; nothing else could have put that kind of oil build-up in the MAF meter so quickly, other than the non-paper element that was upstream a few inches.

My view on oiled filters, for a stock Yaris like mine, is it'll save money when you're able to re-use it, but it's sure not worth it if you're thinking it'll give you big savings at the pump and will give you power that can be felt.

...and I'm sure the dealers have no problems charging customers for a computer analysis, cleaning, and sometimes even replacing MAF meters; pretty sure they stock and sell them all the time.