Oil Filter...

[190D22]

If you guys remember, I had the API service question, and I did get the wrong oil, so I've got 2000 miles on this oil, and I am going to change it very soon because it seems to not be doing very well (oil pressure takes a lot longer than it used to to come up, and I get a clicking before the engine is warm that never occured this often, it did happen before this oil, but once in a blue moon).

I'm thinking going synth blend or full synth (and definately paying attention to the API service rating), with a lighter weight oil to prepare her for winter. I remember someone on here saying that full synth eventually quited up the more clacketiness that the 60X have... this true?

All of you seem to say that STP filters are *****. Which oil filter should I buy for my 190D 2.2 and where do I get it? $$$?

Thanks guys.