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there are a few kinds of BH that help cars start from extreme cold weather,: h0 Q% W( k8 e; w- E/ z1 X; T
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.
$ g) Q9 J$ j: D+ ], qEither way, the engine shall not be frozen with use of BH.
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& x! V& B/ N' T; bIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.2 ^) B% G5 O9 P- g+ E+ ]( n
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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