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there are a few kinds of BH that help cars start from extreme cold weather,
3 |- s+ c( W. C2 g- z2 ?; w! @basically , 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.
: @' O0 V$ |- t2 z' w* t. z2 gEither way, the engine shall not be frozen with use of BH.
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, L3 |- k* r$ N7 _* oIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.) F) }8 i- |2 \+ a
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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