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there are a few kinds of BH that help cars start from extreme cold weather,! h& f' T) `/ K" Q" P' S1 [: g
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.
# n1 d# b. O. R( d9 {1 iEither way, the engine shall not be frozen with use of BH.
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* }3 T& f' w! L% O+ d sIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
; h" d/ F7 x# ~4 n: |; s, iA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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