LOL, you always want to let your car warm up on colder days. If there is some dew on your car, warm it up for sure. It takes about 2 minutes, just let the engine get a little heated up before you let it rip. My 95 m3 hesitates in the morning like it's does not want to go fast. is this related to Gas or what? this happens in the morning when i drive the car after it's been sitting there for a day or so? it only happens once or twice while i am driving , but after that, it's ok.