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there are a few kinds of BH that help cars start from extreme cold weather,& `6 |1 h, G, D+ U* h5 H
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.
3 o1 b H: i3 S1 O) zEither way, the engine shall not be frozen with use of BH.
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# S4 R2 B# d. Q% ]- b4 }8 t5 QIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.9 a1 d% V: V4 f- q3 m1 E
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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