I wouldn't put much stock in that towing *test* mentioned no one in the real world drag races their pickup uphill with a loaded trailer
what I want to know is how well the engine lugs in high gear when climbing a hill at highway speed , or maybe if you drop one gear or 2 on a real big hill
In the real world, starting on hill pulling a loaded trailer or even not towing, it's nice to have power. Even more so at altitude where you really feel it. No matter what it is, a gas engine will drop gears on mountain grades. Diesels are turbo and don't even feel either grade or altitude. No gas truck will have anywhere near the power of a diesel where it's useable, about the 1800-2200rpm range.
