Hi you all. New RAM owner here. I own a 2019 RAM 1500 5.7 Hemi Laramie Sport. Recently I have been getting 9-10mpg on the highway and in the city. It is driving me crazy. I recently did a road trip (towing 4,000lbs) and that's when I noticed it changed. Even though I am not towing now the mpg has stayed the same. Before I towed I was only getting 12 mpg. I have the 21-gallon fuel tank and have to fill it up every 2.5 hours! So, I would love your opinions- should I add an additional tank? How can I fix this issue? Or should I just get a different truck or model and trade this one in?