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post #5 of (permalink) Old 19th January 2010
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Re: DCI 120 MPG - Whats yours say

I have no idea what is going on with mine. Firstly it is NOT the MAF sensor or the EGR valve. Confirmed.

In an experiment to figure out why my car was returning 34mpg, I decided to run the tank down to what I thought was vapour.

I filled it up until pump clicked, then a bit more... then a bit more until it so nearly got onto the forecourt.

That was 54L. A few alarm bells started ringing.

I then ran the car down to back where it was (what I thought was vapour) and returned 540 miles.

The trip computer told me I had consumed 15.8 gallons. Which I believe is nearly 72L.

If you work it out the MPG is correct, around 34mpg.

However, if you actually work out what 54L is, which converts to 11.8Gall on 540 miles you get 45.49mpg.

Which is acceptable for what it was used for!

Anyone explain this? I have a few obvious theories.
Currently in fundier's garage:
2004 Megane 1.9dci CC
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