# Horrible Gas mileage

**URL:** <https://community.cartalk.com/t/horrible-gas-mileage/167594>\
**Category:** Maintenance/Repairs\
**Tags:** mini, cooper-s-countryman\
**Created:** [July 20, 2020, 7:29pm UTC](https://community.cartalk.com/t/horrible-gas-mileage/167594 "2020-07-20T19:29:02Z")\
**Posts on this page:** 6\
**Page:** 2

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**Author:** ![NYBo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nybo/32/17281_2.png) [@NYBo](https://community.cartalk.com/u/NYBo)\
**Post date:** [July 21, 2020, 4:36pm UTC](https://community.cartalk.com/t/horrible-gas-mileage/167594/21 "2020-07-21T16:36:24Z")

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> [@lion9car](#):
>
> > [@VDCdriver](#):
> >
> > It wouldn’t cause the car to consume more gas, but it could cause the onboard MPG readout to produce bogus readings, thus leading the OP to _think_ that it was consuming more gas.
> 
> If the odometer says the car went forty miles when it actually went only ten miles, the calculated MPGs would be extremely good, not extremely bad, as reported here.

I think what the OP was trying to convey is that the readout went from 40 MPG to 10 MPG, not miles. Otherwise, the post makes no sense.

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [July 21, 2020, 5:31pm UTC](https://community.cartalk.com/t/horrible-gas-mileage/167594/22 "2020-07-21T17:31:39Z")

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And we still don’t know how much fuel the person had to put in the tank unless I missed that .

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**Author:** ![DevMartin17](https://avatars.discourse-cdn.com/v4/letter/d/ecccb3/32.png) [@DevMartin17](https://community.cartalk.com/u/DevMartin17)\
**Post date:** [July 21, 2020, 5:34pm UTC](https://community.cartalk.com/t/horrible-gas-mileage/167594/23 "2020-07-21T17:34:53Z")

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It filled up 10 gallons so it did actually need the gas

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**Author:** ![VOLVO-V70](https://avatars.discourse-cdn.com/v4/letter/v/8e8cbc/32.png) [@VOLVO-V70](https://community.cartalk.com/u/VOLVO-V70)\
**Post date:** [July 21, 2020, 5:37pm UTC](https://community.cartalk.com/t/horrible-gas-mileage/167594/24 "2020-07-21T17:37:37Z")

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You had to add 10 gallons each time after a 65 mile trip ? Then this thing needs to be in a shop .

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [July 21, 2020, 5:38pm UTC](https://community.cartalk.com/t/horrible-gas-mileage/167594/25 "2020-07-21T17:38:25Z")

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I don’t believe that it is possible for the engine to consume 3 to 4 times the normal amount of fuel without the check engine light illuminating.

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [July 21, 2020, 6:32pm UTC](https://community.cartalk.com/t/horrible-gas-mileage/167594/26 "2020-07-21T18:32:51Z")

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Something is not being figured correctly. There simply is no way for this car to get roughly 6 MPG without belching smoke, fouling plugs, and illuminating the CEL; along with polluting the O2 sensors and converter and creating a stink at the tailpipe.

If there was a fuel leak that bad then that too should be very noticeable.

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