3g hemi gas mileage

5.7 hemi said
If a Ram truck that weighs in 5000+ lbs can get 20 on the hwy, no reason why my car that weighs alot less should not get better than 13.5 period.

I have an '03 5.7 Hemi in a Ram truck and I get nowhere close to 20, more like 10.5 to 11 on a good day.