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there are a few kinds of BH that help cars start from extreme cold weather,
. i/ A8 _# H7 Zbasically , 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.
( _& ~' c& F, k# X9 GEither way, the engine shall not be frozen with use of BH.* x# K8 a. Z9 `0 p
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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., T& j3 }$ G+ d' z
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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