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there are a few kinds of BH that help cars start from extreme cold weather,
& N. W8 Q# O) L. ibasically , 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 l: s( H0 t& t: i: ~" xEither way, the engine shall not be frozen with use of BH. z1 ?3 j8 Q- N8 y: a6 m
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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.% \, Z0 ], C+ \( D
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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