I own a 2010 Tundra, 4.6 engine, 4:10 gear, tow rating 8300 lbs. Our trailer Jayco 26' is just under 7000 lbs loaded for our long road trips. I have owned the truck and trailer for four years now and we have driven from Chicago to Disney, Tennessee, Indiana, and Michigan multiple times. I am very impressed with the stability and ease of towing that this truck offers. 70 and 75 mph speed limits no problem, and that is the small V-8. I can only imagine how much stronger the 5.7 is? Gas mileage has been a solid 19 highway (no towing) and 9 ish with the trailer. I hope this helps.