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I would really like to hear an opinion from JFP in PA. In previous posts, he seemed to have extensive knowledge on the subject and have quite a bit of oil analysis on multiple Boxers that backed the Castrol being superior to Mobil 1. I would also like to know how he feels about the Castrol in the 5W 50 weight.
A lot of Boxster owners complain about start up noise (I do not have that problem). One of the reasons I stayed with the 5W instead of 0 is due to my belief that the thicker oil at start up may be adhering to the engine parts better. Just a thought.
From what I could gather reading previous posts JFP in PA works at a shop that keeps track of the oil changes and the results of the oil analysis after the change.
Last edited by Meat Head; 05-01-2013 at 10:01 AM.
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