Another article confirming what we know. The best way to warm up is by driving.
http://www.popularmechanics.com/cars...-harms-engine/
"We asked Volvo, which conducts cold-weather testing in the Arctic, whether their new cars need any sort of warmup, and the answer was an ever-so-slightly qualified no. According to Volvo, "It’s best to just give the engine a few seconds to build oil pressure before driving normally. Good oil quality and condition are crucial for protecting the engine in cold start conditions." "