3g hemi gas mileage

I was going to use 3.91 gears as well. Drove a 2010 ram with 5.7, 545RFE, and 3.91 gears, at 70mph, It turned 2000 RPMs, thought that was a great number.

I was hoping to see at least 20mpg on the highway from my 05' 5.7 and 09' 545RFE.