[flybouy]

Same fuel, the off road diesel will damage your truck as it is not low sulfur. The repairs would be more costly than the fines. I don't use the truck pumps unless forced to either by pump island positioning or low fuel desperation. If you plan ahead you won't get into those bad situations. There are aps available for "rv friendly" fuel stops and google earth satellite images are good also. Bear in mind also that truck stop pumps on the truck side do not take credit cards, typically only company fuel cards so you must go in, wait in line, pre pay, often with a substantial hold on your card. Then pump and then return to the cashier for your receipt and to reset the pump.