My understanding is that in Europe they change the oil less often and the recomended change interval is longer. Same car. I am sure that running Mobil1 to 7k or even 10k is not doing any damage to my car. I have a Miata. If your manual allows up to 10k under warranty, what's wrong with that? Have you ever seen the synthetic tested out as bad after being in a car? Use a top quality filter. Perhaps only the Chysler brand is available now - I don't know. I could see some cheap filter, like the big name brand that is sold now at all the discount stores, failing before 7k or 10k, but I won't use that brand. No, I don't want to say the brand name and get sued, so let's just say, do research before using filters. You guys probably have the orignal equipment brand only, so it may not be an issue. I know when I owned the first Stealth here is this area, I was limited to Mitsubishi filters only.

8) LOREN