I will pass on some information my grandfather gave me when I was first married many many moons ago. "Never check your MPG or how much your wife spends while shopping, both will piss you off and there is almost nothing you can do to make either of them better."I have done been driving almost 600 miles and I have an average of 16.1 MPG. My current tank has an MPG of 13.9 MPG with 118 miles. Am I crazy or is this horrible economy. My 2018 2.7 always hovered around 20 MPG and I am driving the same.