I would never go over 3000 no mater what oil I was using. That said, I use Pennzoil, as its the same thing my father uses in my mother's 1992 camery which has never had an engine problem since the day they bought back in late 1991.
NASCAR Nextel Cup, the Greatest Sport Ever.
2004 Ram 4x4 1500 Quad Cab
5.7L Hemi, Sport Appearance package