CA-Legal-Vette Posted May 17, 2009 Share Posted May 17, 2009 Hi all. New to this forum and also have a fairly new 2004 GS430. Lots of questions but I'll start with the three most urgent to me. I'm changing the oil today. I'm a big fan of synthetic oils and intend to use Mobil 1 5-30. Any opinions one way or another? Is there an engine oil service reset procedure? I've got the service manual but it doesn't mention it unless it's hidden elsewhere. Last, I bought an upgrade DVD for my navigation system. After reading about the various bypass issues I'm mildly concerned that the version 8.1 will be a downgrade from my previous sytem rather than an upgrade, though it'll be very nice to have missing roads back on the map. If I run the upgrade DVD and don't like it, can I just reinstall the old one? Thanks all for your help. Quote Link to comment Share on other sites More sharing options...
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