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there are a few kinds of BH that help cars start from extreme cold weather,
" Q/ e( k% n* p7 u8 a! ~. s5 t! |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.
2 K9 d2 u0 @* \2 i& @: t. m; O5 \Either way, the engine shall not be frozen with use of BH.3 o9 z3 ~! {' ]& r
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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.' @! r- l; b3 }
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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