Originally Posted by SixZeroFour
It's not all wrong.
The speed you are going over the posted limit doesn't have anything to do with it, its how heavy your foot is on the gas when accellerating away from stoplights, or as you mentioned passing etc.
I don't doubt that you can pull the 22mpg hwy because the V8 is shutting down two cylinders and running in eco mode...
Take a look at this post:
Hemi Gas Mileage?
The majority of owners are registering between 11 and 14 mpg with the hemi.
The winter blend/summer blend difference is also probably padding your numbers by 2-3mpg. Since you are down south I would assume you get the summer blend year round unlike the rest of us living in colder climates. If this is the case it would bring your numbers right inline with the average shown in the other thread.
The point I was making was I don't drive like a "granny" as you mention we must do to be able to get that type of gas milage. The speed you are driving as a huge bearing on your mpg:
- 3% less efficient at 60 mph
- 8% less efficient at 65 mph
- 17% less efficient at 70 mph
- 23% less efficient at 75 mph
- 28% less efficient at 80 mph
So by saying I drive an average of 10mph over I'm saying I'm not helping myself out by doing so. I agree with you summer/winter blends, and sure it does affect my mpg in a good way.
From my experience I'm seeing the V6 get 2 maybe 3 mpg better than my V8, which IMO isn't worth the loss in power/performance/towing.