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there are a few kinds of BH that help cars start from extreme cold weather,) M& @7 {8 U2 j6 y- 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.
8 ^4 |2 f7 D8 H! V# v) R3 ]4 vEither way, the engine shall not be frozen with use of BH.( ~, x" ^# n* a4 c3 l, e* k
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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.5 S" P% x# L9 r9 L& Z/ 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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