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there are a few kinds of BH that help cars start from extreme cold weather,
7 c h4 s& j# S# C) x' c' O' jbasically , 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.
3 A* ^: a, W Z: C: p8 }Either way, the engine shall not be frozen with use of BH.' l# z ~0 C7 @5 p; Z$ \8 b
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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.8 g! \; f& H+ @; x, l/ w! d; J9 T
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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