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there are a few kinds of BH that help cars start from extreme cold weather,5 R8 |3 K( x# W4 q! I
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. L5 Z2 N1 ]! O% g. V, x' f2 q& ?
Either way, the engine shall not be frozen with use of BH.+ T5 d& N; N! m& e1 G) v& D
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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.
( `8 H8 s- w1 \ OA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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