Quote:
Originally Posted by Piwoslaw
The glowplugs use your 12v electrics to heat the coolant while you drive. Also these 50-150 watts put an additional load on your engine, on 1 hand warming it up even faster, on the other hand increasing the risk of draining your battery if you do it constantly on short trips.
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I guess a full winterization wouldn't rely solely on a glowplug-based heater, so it might also require other approaches. Electric fan if the vehicle was fitted with a mechanical one instead, some sort of grille block being also desirable, maybe a higher-capacity battery such as those Optima ones which are often pointed out as having both a higher energy density and suitability to harsher environmental conditions.