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there are a few kinds of BH that help cars start from extreme cold weather,
: L1 A9 u4 d2 ]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.
% } u* f3 T( m1 U9 O3 z8 B/ }Either way, the engine shall not be frozen with use of BH.
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( T1 C9 A) G2 T) B9 T% o. vIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
- [/ q! R; f' K: x0 Y2 sA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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