I was threatened by a BMW service advisor that if I did not let them change the oil at this time, my engine warranty would be void. When I told him I already changed the oil 2k ago, he asked me where and what oil I used.. And directly threatened me that I was voiding my cars engine warranty. Or as he put, "your car's warranty". They hire the biggest douches as advisors there. And charge the most obscene prices for maintenance services there.
BTW: this was back in 2011
BTW: this was back in 2011