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there are a few kinds of BH that help cars start from extreme cold weather,# O9 u3 c' Z; t) H( b2 C1 \5 V0 c
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.
3 P( K1 A& j( d$ Z% k, Q7 z3 IEither way, the engine shall not be frozen with use of BH.* m- ?7 q$ d" H; |* `' t
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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.
* M2 T8 T0 V: Z( G: XA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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