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there are a few kinds of BH that help cars start from extreme cold weather,
! _1 @7 u+ y2 L0 K9 ]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.9 h) ~/ {: ^7 r4 |
Either way, the engine shall not be frozen with use of BH.
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! @2 E( @! w' xIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
c) w" c% l$ U) k) |A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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