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there are a few kinds of BH that help cars start from extreme cold weather,* i2 k8 E6 j2 m
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.& o* O1 `: T& A( F5 o3 o! u
Either way, the engine shall not be frozen with use of BH.
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0 J; N7 o1 v* LIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
! i) C7 F# Q/ \5 N3 E; _) IA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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