Looking at spending $25-30k on a descent used truck. I would like to stick with 1/2 ton and Crew Cab. I have been looking at Tundras, Sierras, Silverados, and f150s. The big questions I have on all of these is ecoboost or 5.0 or the F150s and what is the real world gas mileage of Tundras? Can you chip a Tundra to get better MPG? Any suggestions or feedback would be appreciated. The biggest thing I pull is a 3500lb Ranger Boat. I want a reliable but capable truck for off road for my western hunts. Thanks in advance.