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there are a few kinds of BH that help cars start from extreme cold weather,- \; P9 q; j5 e# ~% c
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& D, S. }% M8 T5 BEither way, the engine shall not be frozen with use of BH." R: P& b, ~4 A5 a; V1 J: ~$ 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.
, S+ E" x+ F' i# g' S2 VA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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