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there are a few kinds of BH that help cars start from extreme cold weather,. [# ] V0 K+ F, j& Y3 F) 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.4 b" c( j& C6 e! ?3 L6 [
Either way, the engine shall not be frozen with use of BH.0 B; d. g5 V/ q* y/ ^5 J* I
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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.+ q( H+ p4 X& n* 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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