Quote:
Originally Posted by Dean
Depending on the oil, the filter is really the limiting issue on turbo Imprezas. it is relatively small, and next to the headers, so deposits get baked into the filter and the filter can clog and go into "bypass" which is not good at all.
Bypass basically means the filter stops filtering and worse, deposits in the filter can actually be stirred up and reenter the oil stream.
This is why using the highest quality oil filters with the most surface area is so critical on our cars. Speaking of which, has anyone tried any of the "tall" filters? I'd have to go dig up the Nasioc thread to remember brands/models, but basically, they are 25-50%ish taller than the Subabru filters.
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I know the Mobil-1 M110 is a popular taller filter choice. However, I don't like Mobil-1 filters. I use the Purolator PureONE PL14460. This is what they'll give you at Pepboys (only place that carries them AFAIK) if you tell them you have a MY 02-3 WRX. It's the same filter that came on my car when I bought it new, so I've read, only it's textured for easy removal. Purolator made them for Subaru, as I understand it.
It's true that Subaru went to the smaller filters because the larger ones would absorb too much heat from the manifold but mine are heat wrapped under the OEM heat shields so I feel like it's safe.
Also, FWIW, I've heard the new blue filters from the dealer are made by Honeywell in Canada and they're crap.