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there are a few kinds of BH that help cars start from extreme cold weather,% L6 G6 E4 W7 w
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.
/ p0 t& _3 G% ?, S. g/ HEither way, the engine shall not be frozen with use of BH.* S( E" ?6 s$ D
2 J `8 O7 a" dIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening." z# j( l0 O& G: E7 X2 u. s/ |) P6 h
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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