Having been around for a while and only noticing this debate raise it's silly head in the last few years, I'm guessing it's what the technicians are being taught nowadays. They seem to be the ones pushing the issue.
Watch NASCAR, they talk about motors. I try to be PC when I'm round my professional friends. Around my motorhead buddies I don't worry about watching my language so much.
And, motormouth/enginemouth? I guess it depends on whether you're plugged in or just have a lot of gas in your tank...
