The word "excellent" was certainly used.Originally Posted by boca rat
I like Amsoil filters because they reduce the time required to build oil pressure into the heads. This helps reduce top end noise on startup. I further like the filters because they are synthetic media which filters far better than paper media types. The micron rating is lower and the percentage of debris caught is nearly 100%. They also last longer with more consistent performance.
After doing countless oil services on all sorts of European cars, it always makes me cringe to see a paper element become hard, brittle, usually caving in from the excessive resistance. At a certain point the oil filter can cause the over pressure valve to open. This allows unfiltered oil back into the engine.
Having changed a lot of oil on RS6's (besides just mine), simply using an Amsoil filter always helps to reduce startup noises. Of course I'm using Amsoil engine oil. Not many companies are quite so OCD to make their own filters and oil. Pretty cool in my book.
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