The operating manuals for all three of our vehicles (Seat, Nissan and Yamaha) all say drive as soon as possible after the car is started, do not allow it to warm up while stationary.
Of course, when its frosty it's normally dangerous to drive straight after starting, as I'm still chipping away at the ice! The bike is also quite difficult to ride with full choke on (still runs carbs), so I try and give that at least five minutes while I put my helmet and gloves on.
You could always use the finnish method of preheating. They have an electrical connection running from a power socket to the car, that powers a water heater. So the car can warm up without having it's engine running. I've no idea how it could be set up though, although I did see a couple of SEAT's and VW's out there, all plugged in.
Of course, when its frosty it's normally dangerous to drive straight after starting, as I'm still chipping away at the ice! The bike is also quite difficult to ride with full choke on (still runs carbs), so I try and give that at least five minutes while I put my helmet and gloves on.
You could always use the finnish method of preheating. They have an electrical connection running from a power socket to the car, that powers a water heater. So the car can warm up without having it's engine running. I've no idea how it could be set up though, although I did see a couple of SEAT's and VW's out there, all plugged in.