-25 and the windchill brings the temp down to -40 all week and it starts! Tonight is the first night it'll get it pluged in because I'd been too lazy to replace the block heater plug 'til now, kind of rotted off.
-> Using 5 / 50 sythetic, fuel additive, cycle the NEW glow plugs 'til it starts to fire as many times as it took (3 or 4), then it would start on three or four cylinders and run. Rough on the old *****, but she warms up faster than gas cars I've owned and runs on 5 in a minute or two. Charging system up to snuff, and all the filters are fresh helps a bit too I suspect. Run it hard and fast once it's warmed up and it never fails to start the next time.
Oh yea, and it was 100 in Alcapulco three weeks ago on a trouble free 4 1/2 week tour.