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there are a few kinds of BH that help cars start from extreme cold weather,
2 K; q G+ Y* `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.
% ^# u3 R5 P7 O4 AEither way, the engine shall not be frozen with use of BH.: g( A1 v' l( y( H# k& o
6 F: e0 B3 n& q7 bIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.. @3 r" Q |% B9 W7 q5 I) a, M
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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