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there are a few kinds of BH that help cars start from extreme cold weather,0 d4 h6 s/ ~# Z
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.
" G* s1 E3 o# R7 m6 \Either way, the engine shall not be frozen with use of BH.) i+ U5 [# z( M4 Y# @" [& l
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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.+ e. A: y9 ~4 ~! a* D6 M
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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