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there are a few kinds of BH that help cars start from extreme cold weather,
7 t( J- }- A% G9 f$ E- J. [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 y" R/ e3 H( J0 \; z; n
Either way, the engine shall not be frozen with use of BH.& Y4 ^% j; N1 H0 D+ n* u
) N4 {! k* x( }6 R5 dIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.# S( o, F m# M0 d" U) j
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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