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there are a few kinds of BH that help cars start from extreme cold weather,
. ~% |7 y5 F! Ibasically , 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 u V# c0 y& g
Either way, the engine shall not be frozen with use of BH.
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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.6 P" T9 j# [3 a1 s p4 w
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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