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there are a few kinds of BH that help cars start from extreme cold weather,
! g3 [) p3 D' V0 r9 W+ P! Gbasically , 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 X- a8 O" h1 x1 H+ }; IEither way, the engine shall not be frozen with use of BH.0 ?7 C# `7 V. U* Q& m
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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.
" W7 a; c% e/ [* y% F! PA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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