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there are a few kinds of BH that help cars start from extreme cold weather,
" |! S4 ~5 v3 W. U8 Dbasically , 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.
3 _( `$ ~* m( ^Either way, the engine shall not be frozen with use of BH.
. C% ]5 ]0 I& b- v8 @8 j! E; r# |" \! ?5 d& K3 U
If you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.! o+ y. W i r/ G( A
A good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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