I drove both today also. The 600 seemed alot more peppier.

The 600 got 17.4 mpg while the 555 only got 13.6 on the same route.

 

Read this today

Quote;

600's are QUICK!

So my buddy and I finally get to line them up tonight.

His:
3G, 600, short bed, 4x2, CC., auto, and is bone STOCK

Mine:
2001.5, short bed, 4x2, Ext. Cab, Comp Box(on 5x5), Full DTT with 91% TC, PE4200 pump., HX35, and open element AFE., stright pipe, and a few other goodies that add a little but not much.

Results:
If he knew how to drive it we would have been even, if not ahead of me.

If he had an intake like the AFE then I would be scared ALMOST poop-less.

Also we filled up, drive 149 miles, filled up again and got the same milage. I know 149 miles is not a "true" indacator, but it's SOME WHAT of a compairsion. We both avaraged 21.x

These 600's are great trucks, smooth too!


I think I still want mine................

 

I look forward to hearing what kind of mileage you get Tedroe, I bet it will be better than most with a short bed 2WD.

 

I'm really looking forward to getting this new truck. I just sold my 03 hemi. I really liked that truck but it really wasn't made to tow what I tow. I was only getting around 11mph with it empty and about 7mpg towing. It sure wouldn't keep up with my 01 CTD.