alt Hacker NewsCivic fuel economy is about 2x an unloaded SuperDuty, so the SuperDuty owner likely pays maybe a bit more than 2x in gas tax + registration.
+700lb (+25%) => 2.25x damage +2800lb (+100%) => ???x damage
Your story doesn't provide a formula, but seems obvious it is much, much greater than 2 - this isn't a linear relationship
And that's the very lightest SuperDuty model, unloaded.
Excellent, much more useful.
Not sure where you are but in Indiana, gas tax for unleaded is 36c while diesel is 62c so on a per-gallon basis, that's an additional +72% in taxes. Back of the envelope: Civic at 30mpg pays 1.2c/mile vs SuperDuty at 15mpg pays 4.13c/mile so the multiple is closer to 3.4 vs 2
So yes - assuming registration fees are comparable and mileage is comparable - the SuperDuty should pay more.