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there are a few kinds of BH that help cars start from extreme cold weather,6 n0 @7 \% E+ E4 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.
) ?" F+ G5 b) g' }' ?5 ~& pEither way, the engine shall not be frozen with use of BH.
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& ^- o$ O+ B% a! ^' i* AIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.. U& q# @* z* |8 ]6 Q) ?2 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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