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there are a few kinds of BH that help cars start from extreme cold weather,! {5 s4 m- o& h& f
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.
; u! T$ L; I; T% ^# }! DEither way, the engine shall not be frozen with use of BH.
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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.' m+ x5 T4 K c! i
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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