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there are a few kinds of BH that help cars start from extreme cold weather,
- B- X: c4 Z. z! B |, s" R7 ?, ybasically , 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.# R, f: j! U# e
Either way, the engine shall not be frozen with use of BH.$ X- L2 T1 z* e, ?, v0 H7 Y# Y
: ~" n8 \! \5 \ I" \7 uIf you do not have BH on ur car, by using synthetic oil you can also prevent oil frozen from happening.
% o2 C! e+ R. u; tA good synthetic oil, 5w20 or 5w 30 , or 3w 20 has a pure point of -30 to -40 degrees. |
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