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there are a few kinds of BH that help cars start from extreme cold weather,
% |8 u* x( q" \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.5 U2 x; k! _# w7 e
Either way, the engine shall not be frozen with use of BH./ D( {1 _5 F$ C8 ]! W: B0 P
! }7 P( B, @8 c% H. Y& VIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.+ Y1 v9 h. }: ^# t
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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