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there are a few kinds of BH that help cars start from extreme cold weather,
, n2 E8 K: G) E7 S& [2 R5 Kbasically , 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.- _" n* V7 R! A: r6 Q
Either way, the engine shall not be frozen with use of BH.$ V1 f/ d+ l7 @; S) ]) A
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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.% R3 p7 ~! m5 P' z" o0 T B
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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