MINI Cooper Forum - View Single Post - Fuel economy - can you get 400 miles out of an R53 JCW?

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post #7 of (permalink) Old Jun 27th, 2018, 11:56 AM Thread Starter
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Originally Posted by minione2002 View Post
My One now has a new O2 sensor it is averaging 42mpg brim to brim.

It's amazing what those pesky pricks can do, they rarely cause a check engine light, so many people are driving around with dicky ones.

And the result of ****ed O2 sensors was on my particular car 26mpg
Forgive my ignorance, but what is an O2 sensor and where can I find it and replace it?

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