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there are a few kinds of BH that help cars start from extreme cold weather,
/ \$ A* [" k) M# E# 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.8 Y% P6 V! ~9 s m7 F* D! |
Either way, the engine shall not be frozen with use of BH.; j4 g2 k# p1 O8 u+ {5 O. r
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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.9 E1 `$ v! k1 g( i7 T2 _* X x
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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