I've got to make a video of the TDI next time it gets down to -30 around here and I did'nt plug it in. A couple weeks ago I was on 5W40 when we hit -28C (no windchill...). It cranked half a turn and started like a champ, but man did it coughed till I was out of the parking lot. It might get easier since I switched to 0W40 last week, but I'd bet it would still be interesting to watch.
As for the metro, there is way too much cooling power in this little thing. Even my TDI, which probably doesn't generate as much heat as the metro's engine, will heat up in 10 minutes at 2500 rpm without a grill block.
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