I call my old station wagon the "Honey Wagon" because it runs totally on methane but it took me some time to convert it over.
I live out in a wooded area so I don't have any close neighbors but every time I get on the road to go get groceries, there are people puking all over the parking lot.
But, on the plus side, I can run it for an entire month after I bring home a huge order of beer and beef & bean tacos.
I.B. Moleturd (But I'm being called much worse)