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there are a few kinds of BH that help cars start from extreme cold weather,3 F( \$ r9 K' u7 S: E Z
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.
5 ]3 ]3 V" m7 g4 B( I. MEither way, the engine shall not be frozen with use of BH.
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! i1 r' k& u$ A. A7 q6 [8 UIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
- H+ h& Y4 D- d/ yA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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