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there are a few kinds of BH that help cars start from extreme cold weather,8 r2 n+ B- l3 ~; r/ V
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.9 Y- |# D1 N+ y& Q* g4 K
Either way, the engine shall not be frozen with use of BH.
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6 }& g* S2 @; S2 eIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.' l$ K1 D( _, k# h: x8 N
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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