Re: 3.0 vs 4.0
I have the 3.0L version in my taurus (which weighs a few pounds more than a reg cab long box) and it performs fine for everyday driving. The one thing I did notice is that if you drive a lot of highway miles, your best to get the 4.0 with the 3.55 gears. Lower rpm's, more torque for the hills and will net the same highway mpg with the auto.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!