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there are a few kinds of BH that help cars start from extreme cold weather,
; \0 y5 D# {+ m" d/ gbasically , 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.; t4 ^# K$ [& | [4 ?, x& \
Either way, the engine shall not be frozen with use of BH.4 \: K0 p! O/ B* u% F: o
, P7 U6 ~% u, }+ Z! YIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.2 e, ?+ N' z# y- k$ X# K
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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