I ran my 4.8is up to New England last summer with out a hitch or a hiccup. Cruised along at 75-80 the whole way (hit 110-120 a few times). Comfortable and get torque for shooting those gaps in traffic. 2000 miles in 7 days. One leg was 600 miles in less than 10 hrs. Would have been less but you know how NYC traffic is on a Friday....

Do all the preventative maintenance, including fluids, check brakes, test charging system and starting systems out put and draw, and then off you go to a fine trip. There is an old stream train run into the Grand Canyon that you should not miss. Welcome to the Grand Canyon Railway | Grand Canyon Railway & Hotel, Arizona "Grand Canyon Railway departs daily from Williams, Arizona, 65 miles south of the world-famous abyss. Coined the “Gateway to the Grand Canyon”, Williams is located off Interstate 40, 32 miles west of Flagstaff."

Best experience into the Canyon for the whole family..... My wife still talks about it.

Enjoy!

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2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green