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there are a few kinds of BH that help cars start from extreme cold weather,6 @( b( r' R6 h9 ~
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.9 m: z" W8 U' L
Either way, the engine shall not be frozen with use of BH.* H1 k* N7 b' A; P! t4 ^
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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.
3 O& J6 @) `# ?/ KA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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