It will be used almost exclusively for hauling - typically with a trailer. If I'm hauling wood, the trailer weights will top out usually around 7-8,000 pounds. I'm also looking at getting a toy hauler travel trailer that will top out between 10-11,000 pounds.
You say right up front, “it will be used almost exclusively for hauling,” but then this if followed with a lot of discussion over fuel mileage when not hauling. Were you simply over-stating your case? Why would you care at all about unladened fuel mileage, if it is used almost exclusively for hauling?
I have owned numerous 1/2 ton trucks, and have owned a half dozen different trailers of various weights. I have regretted every single time I have bought any truck with less than the maximum engine size available in that platform. Every, single, time. I find the larger gassers really don’t get worse fuel economy than the smaller engines, after all fuel is just liquid energy, and the amount of energy required to haul your ass around town has very little to do with the engine that is converting that liquid energy into motion, and almost everything to do with the weight of your vehicle and your driving habits. Simple physics, removing the net efficiencies of the engines involved.
I won't debate this too passionately but my neighbor and I, same 6.2's, drove a bunch of miles a few years back comparing E85, regular and premium. Both of us had the same result - premium is the lowest cost fuel to use in the 6.2's. E85 was the next closest. Regular was the most expensive. Yer spending more money running regular
This really depends on your specific engine. Higher octane fuels do not always contain higher energy density, there is no correlation between octane and mileage, when using fuels above the minimum octane recommended for your engine. However, when moving into fuels below the recommended octane, efficiency does drop thanks to two factors: (1) pre-detonation or knock, causing higher fuel consumption, and (2) your engine’s computer making adjustments to minimize knock, which will cause a drop in horsepower and your right foot to respond by increasing fuel usage to make up for this loss.
So what you’re really saying is that the threshold for the 6.2L is in this range, somewhere above 87 octane, which is probably noted somewhere in your user manual. I know the Dodge 5.7L manual states the engine CAN be run on 87, but that performance will be reduced and fuel usage increased. They recommend minimum 89 octane, if I recall.
Following up on this a bit more...a 3/4 ton or larger pickup (assuming its at least 8600 GVW) will have a "full floating" axle...the weight is carried on large bearings right in the hub...like this pic.
On a half ton the weight is actually carried buy the axle shaft itself...that's the shaft that's pulled partially out in this pic...on a 3/4 and up this shaft only provides power to the wheels...it carries no weight.
Big difference in strength there.
I cant find the pic now, but somewhere in the recent past I seen a pic of a guy that had broken the rear axle on his F150 after loading a HUGE log in the back of the truck...
I’ve broken two semi-floater axles, in 25 years of driving. Scary as all hell, at highway speeds. If I were pulling a trailer with tongue weight anywhere near max spec for a truck, I’d also only want to do it with full floaters.
Do note that trucks in the last ten years are rated for higher tow capacities than the same trucks ten years ago. I believe this reflects a change in how they’re spec’d, more than any improvement in actual capability. In other words, manufacturers are getting more aggressive in their spec’s, to the point where it’s a little dangerous and deceiving. Most now rate their max trailer weight according only to max tongue weight, simply multiplying max tongue weight by 10x to derive a max trailer weight, as if one might manage load their trailer to the exact safe minimum 10% tongue weight. This is dangerous, as many folks don’t understand this, and loading a trailer to less than 10% tongue weight can make it uncontrollable at highway speeds.
i will never buy a 1/2 ton again... i just haul 2 atv's on a trailer but most of the time just one in the back of the truck...
I’d not go this far, it really depends on what you’re hauling and how fast you’re hauling it. I am running a 1/2 ton now, with heavy duty rear springs and a 3.92 rear from the factory, and the integrated proportional trailer brake system. The max trailer weight rating for this truck is 10,160 lb., and I’d be fine towing close to that at lower speeds on local roads, but would never want to use it near that capacity at highway speed for any duration. But I’m fine pulling my much lighter (2000 lb.) boat trailers all around the world with this rig, at any highway speed, as well as my 7000 lb. tandem trailer at max load for shorter distances on local roads.
Buy the right tool for your job. The OP’s present job, presently firewood hauling (assuming local) at 7 - 8000 lb. could be done with many appropriate-configured 1/2 ton trucks. If he aspires to haul that quoted aspirational toy hauler of 10,000 - 11,000 any distance, then yes... that’s 3/4 or 1-ton work.