I have a good friend who just bought a 2006 6.0l CC 4x4
short bed with the 20" wheels 24,000 miles, beautiful truck, bone stock.
Problem is he's getting 8 mpg
around town, hand calculated, computer says 10 mpg
. He's an older guy, late 40's so he isn't racing light to light. It has good power, doesn't smoke, no SES
light, seems to be making the right amount of boost per the dash gauge
Haven't been able to scan it so I'm not sure if it as any soft codes in it....
We didn't have a lot of time to mess with it, south Fla. rain ran us off.
The only thing we did was put a little air in the tires (70psi), and talk about the way the filler tube sits way down in the tank.
When we get back together I'm going to talk him into changing the fuel filter, air filter, I'm also going to give the intercooler boots a good look over.
What else we can look at?