I have done a little over one thousand miles in my 2.0 diesel DSG and thought I would give the car a proper MPG test. I filled the car and drove steadily from South Yorkshire to Whitby and back via Scarborough and filled the car again on arriving home. The computer told me I had averaged 59 MPG for the journey, after filling the car up I calculated the MPG based on the amount of diesel used and the true figure was 50 MPG.

A big difference, the computer claims 20% better than real MPG. My real MPG is decent but I am surprised by how far out the computer is, most of my other cars have been very accurate or within 5%.

How do your computer figures compare to reality?

My CR 170 DSG has done just over 1000 miles from new. The computer tells me that I'm getting 41.0 mpg; fuelly tells me 34.9, so mine's only 17.5% optimistic!

I have done a little over one thousand miles in my 2.0 diesel DSG and thought I would give the car a proper MPG test. I filled the car and drove steadily from South Yorkshire to Whitby and back via Scarborough and filled the car again on arriving home. The computer told me I had averaged 59 MPG for the journey, after filling the car up I calculated the MPG based on the amount of diesel used and the true figure was 50 MPG.

A big difference, the computer claims 20% better than real MPG. My real MPG is decent but I am surprised by how far out the computer is, most of my other cars have been very accurate or within 5%.

How do your computer figures compare to reality?

My 170CR DSG was about 8% out and my current 3.6 V6 slightly less at about 7% optimistic.

There are many threads on here to tell you how to correct this using VCDS and many wiling to help.

As said this can be corrected in VCDS. Mine also runs slightly out, c8% I think, but I track my fuel via a Fuelly account.

Mine was 10% optimistic before i calibrated it with VCDS.

My 170cr dsg is saying 52.1 and actual is 49.15 so nearly 6% out. Will now endeavour to get it calibrated through vcds now.

Mine under reads by about 1-2mpg (9000 miles on my Seat Leon now). So if my computer says 60mpg, I'm actually doing between 61-62mpg.

I have done a little over one thousand miles in my 2.0 diesel DSG and thought I would give the car a proper MPG test. I filled the car and drove steadily from South Yorkshire to Whitby and back via Scarborough and filled the car again on arriving home. The computer told me I had averaged 59 MPG for the journey, after filling the car up I calculated the MPG based on the amount of diesel used and the true figure was 50 MPG.

A big difference, the computer claims 20% better than real MPG. My real MPG is decent but I am surprised by how far out the computer is, most of my other cars have been very accurate or within 5%.

How do your computer figures compare to reality?

Not being from the UK, I have no idea what that distance is. But MPG averages work best over 3 or so fill-ups, even better to keep a running tally. A single fillup can be wildly inaccurate due to everything from the speed of the pump to the temperature of fuel in the tank.

10% over-optimistic here. Just the same as my old Octy. The Wife's Fabia is generally spot on.

Mine was about 7% on the happy side too, but VCDS sorted it.