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there are a few kinds of BH that help cars start from extreme cold weather,# d3 ]4 k/ e, o7 I8 y
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.
, R) E7 V6 k2 A1 ?) w# XEither way, the engine shall not be frozen with use of BH.
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, n4 d3 X7 H) T" p( x7 P1 ?0 tIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
1 R7 z3 v, j: l! ]* X, J& u3 RA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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