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there are a few kinds of BH that help cars start from extreme cold weather,
8 W8 k. f0 S& C. q. h, d6 Ebasically , 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.
; r! J& Z8 ^1 t1 Z2 B2 k* U( ?Either way, the engine shall not be frozen with use of BH.
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' L3 D3 R* K% E. y: r1 R4 ?If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.2 ^3 N+ C0 O' |% f
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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