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there are a few kinds of BH that help cars start from extreme cold weather,
9 i( d7 e& X% w* ?! Rbasically , BH keep the car warm by heating up the oil pan-which keeps the engine oil from frozen, or by heating up the coolant, and keep the engine block warm.
, _" h6 d+ o( {! ~8 X4 y( HEither way, the engine shall not be frozen with use of BH.
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, E" ~7 Z ^0 X ?) x$ ]1 KIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
& q, \7 |- o8 i5 yA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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