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there are a few kinds of BH that help cars start from extreme cold weather,/ w' F% n. i5 F. S I
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.
7 D; @& c' X7 F& Z7 [8 V) v8 |Either way, the engine shall not be frozen with use of BH.
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* Y. ]* G4 |, K3 }) O* g/ {If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening./ U' S6 J( k( K
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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