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there are a few kinds of BH that help cars start from extreme cold weather,0 M( U: X7 n; i5 j6 E% i9 [% F
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.1 j6 w4 [6 j! M1 b4 @" x$ {
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.
( V3 v! {3 z( ]( O# JA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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