It was a high of 18 deg. f Sunday and mine started fine. The trick to cold starting is - turn the key on, bumb the starter, WAIT 3 seconds, shut the key OFF, then do the same thing two more times. DO NOT TOUCH THE THROTTLE. ALSO, my dealer just explained to me that cranking the engine more than five revalotions wont do any good. The computor stops squarting fuel in the injectors. On the oil, I use Amsoil 0w-40 in the motor and tranny in the winter. Amsoil said I could use this oil on the hottest days also, that it would be just as good as their 10w-40. I went on line (www.amsoil.com) and became a dealer. If you buy two cases a year it paid to become one.