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there are a few kinds of BH that help cars start from extreme cold weather,# i# g( i2 Y. C# L, ?% J X
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.7 Y6 D) \5 X4 S
Either way, the engine shall not be frozen with use of BH.
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4 B, O4 G# H( L* E1 z$ n4 S& FIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.* @. d) `& I- c; I- S0 j
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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