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there are a few kinds of BH that help cars start from extreme cold weather,% Z, l7 {6 h, 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.
. m7 [" Z, B4 z5 C% [Either way, the engine shall not be frozen with use of BH.
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' Z: u9 Q" I$ ?1 ?' \4 cIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.( a& L& v) H2 G: S; A0 ^
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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