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there are a few kinds of BH that help cars start from extreme cold weather,5 L7 I. A# y8 x) g8 T; [: I
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.) a# o% w3 r% e1 L0 ]
Either way, the engine shall not be frozen with use of BH.8 C7 Y9 A, e4 ?- p; R. S
2 {7 `6 ?: j# A/ Y- c1 ]. m1 LIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
& `# r% u7 i* U) p" OA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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