Winter gas, winter driving, calculating MPGs
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Not DAVEB the parts guy
Joined: Aug 2000
Posts: 8,549
Winter gas, winter driving, calculating MPGs
Originally Posted by Dave B
-Rowan
Originally Posted by dave b's site
Summer or winter, a car's fuel economy is lower while it is warming up, a process that takes 5 to 10 miles or urban driving. Factors which make the effect greater when temperatures are lower include: more time spent at idle to defog/defrost windows of cars parked outside, more time spent using a "fuel rich" warm up mixture, and the additional energy needed to overcome higher viscosities of the cold fluids: engine oil, differential oil, and transmission fluid. The effect is magnified by short trips. The fuel economy of a five mile trip can be 5% to 15% lower in winter.
i have pretty much all basic maintance from sythentic oil, cleaned throttle, cleaned K&N filter, changed sparks and O2s, ECT sensor new... except knock sensor is still half working
(no CEL, just ghost code)
Chicago has WINTER GAS from mid-sept til mid-april, 7 months out of the year. Although it doesn't really seem to make a difference while it's still warm outside, it does change as soon as the temps get in the 20's. Changing oil while it's 5 below is most fun.
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