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there are a few kinds of BH that help cars start from extreme cold weather,1 b& n+ ~% i' V2 o- i: 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.4 _' w- Y4 G/ w! S8 a2 O: O
Either way, the engine shall not be frozen with use of BH.
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5 @, ^9 J* \$ A; _/ v" r( E# {6 e3 CIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.# e. Z/ g J" _3 _2 T- R, Q/ s3 \/ z
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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