On the good side:
I gave my wife's Professor (Medical School) a ride and afterwards he told his wife that he really liked the ride in my Ferrari.
Obviously not a car guy, but still a very nice compliment
On the bad side:
I gave a guy who came in for a job interview a ride to go to lunch and he kept on boasting about his BMW 330i. At the end of the ride he asked me: is this a 2 liter engine (and yes he was serious)
