I can't figure out why my car has been starting up so well, normally when it's around freezing temps, it won't want to start, or start that easily, but the past few days it has been firing right up, and I can't figure out why . Could it have been that I had very dirty injectors, and the several gallons of used, but well filter ATF that I have been running with the diesel has cleaned out the injectors? I also noticed that my seatbelt warning buzzer started to work again, right as the car started to start up nicely again. I can't figure this one out, but I am sure it will start acting up agin now, that I am mentioning this...