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there are a few kinds of BH that help cars start from extreme cold weather,
8 h: D2 x4 l9 P6 t1 `' Q$ 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 |% r4 I8 h! B8 |; e% Y WEither way, the engine shall not be frozen with use of BH.
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1 V3 f, F J ~6 ]If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
8 Q1 A$ k& f# N" |& N7 P) kA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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