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there are a few kinds of BH that help cars start from extreme cold weather,
" g5 O: H% `" J% T, Lbasically , 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 x3 B# p/ O, P: f
Either way, the engine shall not be frozen with use of BH.2 ]5 [4 E* c5 M; x: b1 X
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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.
) T; l# V0 Z- `1 YA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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