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there are a few kinds of BH that help cars start from extreme cold weather,9 l! O) [4 |2 s, y- e; \+ k7 \
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.. N# M/ A& P! R1 u' ^* o7 [# M
Either way, the engine shall not be frozen with use of BH.9 G8 w0 }' n/ `
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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., m$ w; Q' {6 w
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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