Fawk had a cat m8 in my box and two pro 800s on a 8x10 tailer and was getting 10mpg with my 2010 ram 1500.... Sure a diesel is more money but your buy a more expensive truck and more re sale not just blowing it out your tail pipe.
I burnt twice as much fuel as a duramax same trip pulling a 4 place enclosed.
So I'm going to shoot some holes in these theories......
My buddies dirtymax burns just about much fuel as my 1/2 ton (mainly due to HOW he drives it....but still ), and burning more expensive fuel at that.
if people would drive sensibly and don't try the "drive it like I normally drive it" approach when they have 6,000 lbs behind them, passing on corners, highballing downhills at mach chicken etc., a half ton is often suitable so long as they drive with respect for the load they are towing. They are rated by manufacturers and govt safety bodies to tow that weight, but don't expect to be able to drive it like you normally do. Lots don't, so its not a surprise to see guys saying their trucks don't stop as quick with a full load, I'm pretty sure any professional trucker will tell you that's exactly whats supposed to happen......Leave 15 mins earlier in your 1/2 ton and you will arrive there at the same time as the guy in the 3/4 ton who drove faster.
For anything being heavy enough to require a 3/4+ ton for hauling - The trailer brakes on the TRAILER should be stopping it, not the truck anyway. If you are hauling 5,000+ lbs (hell even 3,000 lbs) with no trailer brakes, you are a fool IMO. The trailer brakes should be controlling the trailer payload regardless of what truck is towing it.
Would it be nice if we all had 1 tons just for sledding? Sure I guess, but lots of the guys doing paper math here are forgetting that just because a diesel can tow more doesn't mean its any safer. Bigger brakes you say? Most 1/2 tons are equipped with 4 wheel discs now and most guys are forgetting that the added weight of the engine, tranny, axles in a 3/4 ton weigh significantly more. Don't believe me? do some research and you will find that unloaded stopping distances are pretty well the same for 3/4+ vs 1/2 ton. I even linked a couple studies for you. Physics is physics and the bigger the mass in motion, the more energy required to stop it. The overall mass changes with a bigger truck, which can help in certain situations when towing, but doesn't necessarily mean it will.
2010 HD Brake Tests - PickupTrucks.com Special Reports
2013 Light-Duty Challenge: Results - PickupTrucks.com Special Reports