Fuel Economy - Hypermiling Dedicated to discussions on fuel economy improvements and related modifications.

mpg dropped quite a bit

Old 02-04-2014, 09:56 AM
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mpg dropped quite a bit

i want to assume this is a winter thing, although ive never noticed it as bad as i did with this car..

i went from 280 miles to a tank ( all city )
to
217
( roughly, im canadian so from 450 kms to 350 kms to a tank, city )

aside from being winter the only thing different ive done is go catless w/o proper tune yet.

to me, that seems like A LOT. but yes its been FREAKING COLD here. -20 C to -30 C daily. for a solid 2 months now

obv juding by my normal numbers i do get on the pedal quite a bit.. more than i should, but i still stay consistant with my mpg numbers..
can i chalk up my paranoia to just winter blend gas and freezing temps?
Old 02-04-2014, 10:16 AM
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my dash used to say 9.0-9.2 L / 100 KM now its in the mid-11s L / 100 KM and been as high as 12.2 L / KM.

iunno this is just one of those things ive shrugged off , but im bored and about to go to work


Last edited by 05g5; 02-04-2014 at 10:25 AM.
Old 02-07-2014, 11:01 PM
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When you were getting 280 miles to a tank, was it really cold outside?
Old 02-07-2014, 11:28 PM
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Also a car can use like 4L an hour during a cold idle.

Warming up your car for excessive time just wastes fuel. Give it a good couple mins so you're windshield won't freeze as soon as you get in and start driving.

Winter gas, idling and a heavy foot add up pretty quick.
Old 02-09-2014, 09:42 PM
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280 miles is my sunmer time avg. city

This car does idle like a champ, 10 min each morning and i dont shut it off when goin inside the coffee shop fast, or convience store. Motherfawkin cold here man

But i will add now, its a combo of winter gas and lead foot. I took it easy past 4 days, 95% of the time keep it under 3k rpm, coasting more etc. Instantly went up to 23-25 mpg in town LOL driver mod ftw. I guess i kinda got outacontrol with my right foot
Old 02-09-2014, 09:52 PM
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Originally Posted by cluelessk
Also a car can use like 4L an hour during a cold idle.

Warming up your car for excessive time just wastes fuel. Give it a good couple mins so you're windshield won't freeze as soon as you get in and start driving.

Winter gas, idling and a heavy foot add up pretty quick.
At first i was like 4 liters no way. Then I realized that's only a gallon.
Old 02-09-2014, 09:56 PM
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Mine is getting between 26 and 27 mpg right now aaccording to the dash. I try to coast as much as possible.
Old 02-13-2014, 10:02 PM
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25.3 95% city driving. according to the dash. Once I get my new tires, I plan on a trip to the coast, and I will report results. I expect at least 34 mpg.
Old 02-14-2015, 03:47 PM
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Next year still poor fuel mileage .
Barely 22 mpg
Old 02-19-2015, 03:12 PM
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I've been driving a lot of city, fairly hard driving, and I've got: 275km / 37L = 171m / 9.75g = 17.5mpg
Old 03-15-2015, 08:14 PM
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Bitter weather, and winter blend octane is to blame. My F150 goes from 15mpg avg to 11mpg avg in winter, and my 5spd ecotec Cavalier goes from 31 avg to 27 avg. And that is at temperatures about, -10 at worst.
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