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there are a few kinds of BH that help cars start from extreme cold weather,
7 i M b0 U4 S* kbasically , 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.
! P& y$ ~2 t) A" c2 U& [' W' pEither way, the engine shall not be frozen with use of BH.+ k0 X5 g g& c: P: w: D
5 @5 p& _2 Q3 m' Z) o& }If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.! e/ v2 e# C" ]9 W! g( J. A( C
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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