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there are a few kinds of BH that help cars start from extreme cold weather,1 \7 N2 c# h9 C% R. n
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.$ i* V. v$ o- E, O. M
Either way, the engine shall not be frozen with use of BH.7 p5 f. g* g! k7 q4 C
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If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
7 \7 _! p5 A$ p4 V( w$ VA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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