[QUOTE=woofy;850584 They leave it on in the diesels as people don't really want to hear a tractor.[/QUOTE]
Ouch! Not nice woofy.
As it happens I've had a few experiences of people standing next to my RS while the engine was running, and them not realising that it was an oil burner until I told them. And for what it's worth, when I drive Sydney/Melbourne without having to stop for fuel I don't hear any tractor noise. What I hear is CA CHING!!!