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there are a few kinds of BH that help cars start from extreme cold weather,
+ ~* y9 l4 L$ B+ kbasically , 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.
% C" |/ w o6 Y( ]' w$ w- }Either way, the engine shall not be frozen with use of BH.
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. }) x/ d# A( b2 \, D& ]If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.9 A0 Z# _. e4 j& X" O$ A! o {
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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