I have been driving my 57 300C regularly over a 9,000 foot summit here in Idaho without any noticeable change in performance. I had expected to see it running somewhat rich at that altitude but have noticed nothing out of the ordinary. I will not be making any adjustments for altitude at Tahoe. George [Non-text portions of this message have been removed] To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/