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there are a few kinds of BH that help cars start from extreme cold weather,# y2 j1 O+ V; u! T/ w k& |# Z" g
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/radiator, and keep the engine block warm.& `+ t" \/ H. [ `7 F
Either way, the engine shall not be frozen with use of BH.
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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.2 V. x7 p2 z0 q
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 have a pure point of -30 to -40 degrees.
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) |3 x8 ?3 w G, Q: Tif you have BH or SO, but ur car still could not be started up, and you have not checked/replaced your battary before the winter came, I bet the battary is dead. |
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