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there are a few kinds of BH that help cars start from extreme cold weather,9 ~! X9 O* m5 _/ b4 p
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.. o4 S; d1 \$ z; w# z9 a# V
Either way, the engine shall not be frozen with use of BH.
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& L- n* {$ ] A- gIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening./ G0 d' N6 w; }" N3 J/ B0 d3 @# k9 z4 e
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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