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there are a few kinds of BH that help cars start from extreme cold weather,
% I/ P. V" V5 d% _) }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.* G- K; U/ \9 m1 q( ^
Either way, the engine shall not be frozen with use of BH.0 K8 w+ T; U5 X8 j. U$ S
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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.
- O! q `$ w' y; q5 h& S/ I, uA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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