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there are a few kinds of BH that help cars start from extreme cold weather,4 v" a( Z2 H$ d. ], l0 t9 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.
4 ?3 j& E5 G- CEither way, the engine shall not be frozen with use of BH.6 x! U( F- l0 j
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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.
4 Z# j" s! l* v9 xA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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