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there are a few kinds of BH that help cars start from extreme cold weather,. v# Z8 O6 p! q: k+ e
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.( Y# d% _1 D6 Z [6 r1 O) b
Either way, the engine shall not be frozen with use of BH.; S( y( }9 z S# ^! a) P
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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.
P; O1 R. A7 M7 \7 b& z0 HA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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