"Have you had good luck with KATS ragragtime?" yes!...i remember the day it was -60F without the windchill factor & the d-50 started!...purchased thru NAPA in fort kent when living in northern aroostook county maine. i was always amused by seeing how far out in the air i could hold the extension cord before the covering on it would snap & fall to the ground...driving on tires with "flat spots" was also a shake test for the truck til the tires warmed enough to smooth out (just when pulling into the parking lot @ work)...& the seat was so hard the rearview mirror would have to be adjusted. you may know that around -30f fuel injected vehicles have trouble starting & can trip their computer...then its definitely not starting...constant problem with my old 1996 2500DSC00059.jpg & it had a hot plug!