Yep. So-called light-duty trucks aren't so light-duty anymore.
So what's the real divide between light-duty and heavy-duty users? When do you spend the several thousand dollars extra and go for the Ram 2500 or Ram 3500 model instead, and when do you simply spend that money on a few extra options or accessories for a Ram 1500?
When to hold 'em with a 1500, and when to fold 'em into an HD?
To us, with the so-called light-duty trucks no longer very light in their ability, it's more a matter of how frequently (and how far) you tow or carry loads. If it's a few times a year—or heck, even once a month, and it's mostly well under the maximum number—then go for the 1500.
It's true that with the Pentastar V-6 the Ram 1500 is only rated for towing 6,300 pounds. But with the 5.7-liter HEMI V-8, properly optioned, the Ram 1500 can tow an arms-race-escalating 10,450 pounds.
So likewise, if you just plan to tow a 6,000-pound pleasure boat (a big craft, even when you figure in the weight of the trailer) a few times a year, the Ram 1500 should be fine—and you'll save some gas money and add to your own comfort. Just make sure you've clicked off the right option boxes, engine, and axle ratio, of course. But if you plan lengthy cross-country trips towing a travel-trailer, or hefty construction equipment with an unsteady tongue load, over long mountain passes, then perhaps the HD trucks are more appropriate.
The Ram HD with Cummins is king, for those who plan to tow
Go for the Ram Heavy Duty model and there's a key powertrain you're allowed: the locomotive-like 6.7-liter Cummins turbo-diesel in-line six, making up to 385 horsepower and 850 pound-feet in Ram 3500 trucks with the Aisin six-speed automatic. In these trucks, you hit a Magic Mountain peak—the highest tow rating of any pickup, at least at the moment—of 30,000 pounds.
The Cummins models got a number of improvements for 2013, like an active air intake, stronger cooling, and a new EGR system that will keep the oil cleaner. And of course you get the big-rig-like diesel exhaust brake ('Jake brake'), made better this year with a Smart Brake system, to help moderate speed down long grades and save your brakes for when you need them.