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there are a few kinds of BH that help cars start from extreme cold weather,
7 p/ U) e5 r2 Gbasically , 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.8 H) k2 q! H# } \; {0 ^" Z. J
Either way, the engine shall not be frozen with use of BH.4 l( m7 x% V f7 o
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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.9 R9 V! u' g. l' J* I- r4 M' d2 r- J \
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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