Geez, I've rented a lot of cars, and never thought they rented "smoking vehicles" at all...every one I've rented seemed to have a visor-label with the NO SMOKING sign on it.....
That's why I don't rent them unless I have to, anymore. And, that's what I told their Rental Agents when I returned them.
Well, personally, I hate it when my vehicle starts smoking, but it seems to me if my Alzheimer's fogged brain is remembering correctly, that every time I rent, they ask, "smoking or non-smoking?". Maybe I'm remembering from longer ago.
BTW, remember the hilarious British Air commercial where the two astronauts stranded on the moon or on some planet walk into a BA terminal to catch a commercial flight home, and the pretty (human) ticket agent asks "Smoking or Non-Smoking?". The astronauts look around the room at the other fliers (non-human), some of them emitting unknown vapors, turn back to the girl and say emphatically "Non-Smoking"! I loved it.