mpg in the cold - Alfa Romeo Forum
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mpg in the cold

hey yooooo lot

anyone noticed the effects of the cold on a 1.6 ts's mpg?

done a couple of 150 / 200 mile runs lat few days - temp here been between -0.5 & +1.5 or last few days

my normal old man driving returns 39 / 40, but ive been struggling to get over 36

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is the engine getting up to normal temp,if not could be thermastat.
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yes cold weather affects the mpg as it takes longer for engine to get to operating temp
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I think, or rather it feels as if my 156 Twinny 1.6 is going a lot better in the cooler air. Sure she spews condensation and all that until warm, but once there, Bella feels aces.

Not really noticed the MPG though, may have to do a trip reset and have me a look-see
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Also cold air is denser so contains more oxygen...

Which means taking it easy should keep mpg the same or improve it very slightly. If you drive hard it will use more fuel though as more oxygen is getting in same space so more fuel is added and you get more power out (it's why engine feels better - effectively earths own intercooler lol).

So combo of longer to warm, sitting waiting on windows to defrost at the start and hard driving and fuel economy can dip noticeably. But on 100-200 mile runs if you are not driving particularly hard I would suggest you may want to look for another reason for the change
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Here the temps are -15 C in the morning
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my alfa averages 37mpg warm or cold depends how i drive. but seems to be quicker in colder weather.
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I was going to post much the same - colder denser air should make more power, but, is that true if your car has a mass air flow meter which measures the mass (not the volume) of the air going into the engine?
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