If JWs didn't waste their gas going to meetings and out in the d2d, they would be using their gas going shopping, to movies, to sporting events, etc. I don't see where any gas would be saved. It would just be used in more fun activities.
True, I guess I am looking at this from a slightly different point of view. The local congregation covers a territory of about 30 square miles. For me to get to the Kingdom Hall I have to drive 10 miles each way. One Elder's round trip was about 50 miles. Average it out over a congregation of about 75 people, roughly 30 cars and you get my point. Sure Saturday would probably be devoted to shopping and fun activities, but really don't they do that anyway? As for myself, I prefer staying home in the evenings. Zero gas burned Tuesday and Thursday, reduced fuel consumption Saturday and Sunday.
Again Blondie, you make an excellent point, but I would still bet most ex-JWs use slightly less gas.