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there are a few kinds of BH that help cars start from extreme cold weather,
R8 Q" z% B- F" |7 _1 K. P/ t! ebasically , 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.
& {" w% i2 e0 N5 pEither way, the engine shall not be frozen with use of BH." M- t* f: x8 r/ L& T n
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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.+ M& A4 B/ F6 Y7 n
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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