Help with bad MPG

[pudding]

/\ Normal, and my experience too.

I don't care about mpg and I never look at, or work out, the mpgs at different speeds and driving scenarios.  I just occasionally look at the long term average (memory 2 on the stalk) and it's been 27mpg for the past 2 years.  It's stage 1 tuned, 310hp.  My mpg didn't change after the remap either, it stayed the same weirdly enough.

To give some context on how I drive:

My daily commute is a 30 mile round trip.  Approx 3 miles of it crawling in traffic from cold (1.5 miles at each end) and the rest Dual Carriageways / country roads.

I give it hard boost pretty much at every opportunity I can, and my average DC cruise speed is 90mph.  I do 70-80 on the back roads if there isn't a blue rinser doing 22mph.

It's a bit like my old R32.  No matter how hard I drove it, I couldn't get the long term average below 26mpg.

27mpg I would say is good for a 310hp turbo engine.   I think there is a misconception that direct injection's sole benefit is improved fuel economy, but it isn't unfortunately.  It's mainly for cylinder cooling to allow a higher compression ratio to be used, which is useful with turbo engines.  The particulates from DI are awful though, hence the black sooty tailpipes.

[Ripstop]

I have had my standard Eddy for 6 months now and was pleased with an average of 27mpg over about 3000 miles on menu 2. However recently I have been getting around 25mpg on my commute to work which is mostly motorway or fast dual carriageway. However I am attributing this to a few things but I get about 350 miles on a tank fill of about 55 litres. I did get about 33mpg on a long run once

• Dodgey thermostat which always goes up and down between 90 and 80. You can see the actual engine block temperature is only running between 68 and 78 most of the time on the secret aircon values, number 19.2. Push Aircon and Upper vent buttons together and rotate Left large knob for 19 and middle large knob for .2
• Rear brake calipers which are slowly seizing up I think and need sorting. Squeaky and the discs are getting a little darker and not bright silver so constantly rubbing a bit

Oh and soot... you would think its a diesel from those tail pipes 

[pudding]

I have had my standard Eddy for 6 months now and was pleased with an average of 27mpg over about 3000 miles on menu 2. However recently I have been getting around 25mpg on my commute to work which is mostly motorway or fast dual carriageway. However I am attributing this to a few things but I get about 350 miles on a tank fill of about 55 litres. I did get about 33mpg on a long run once

• Dodgey thermostat which always goes up and down between 90 and 80. You can see the actual engine block temperature is only running between 68 and 78 most of the time on the secret aircon values, number 19.2. Push Aircon and Upper vent buttons together and rotate Left large knob for 19 and middle large knob for .2
• Rear brake calipers which are slowly seizing up I think and need sorting. Squeaky and the discs are getting a little darker and not bright silver so constantly rubbing a bit

Oh and soot... you would think its a diesel from those tail pipes 

I had 1. and 2. on mine as well.

1. I did myself and 2. the main dealer sorted for me 'whilst it was there' getting a service.  I asked them to look into the back brakes squeaking, and their fix was to replace the whole lot    Calipers, carriers, discs, pads & hoses, all of it!  Pre-empting my shock at the bill, they did say the calipers were beyond rebuilding with new seals because the handbrake mechs were completely seized solid.  Standard Golf!

The result of all that was getting 1mpg back 

I don't think I've ever seen 30+ from mine.  The most the computer says I will get from a tank is 320 miles.  I think it's just accepted my foot is made of lead.  It probably won't bother in future.  I'll fill up and the miles left screen will just be laughter!

Yeah I got a much cleaner exhaust from port injection.  Direct injection is harder on engine oil too, tonnes of soot clogging it up, as well as washing it off the cylinder walls, not to mention bunged up intake valves. Awesome bit of design that!

[Jasons4s]

I would check rear calipers and MAF, the MAF can be cleaded with carb cleaner, if you're carefull, made a huge differnece on other cars I've had.
My MPG went up a bit when I changed my rear calipers, as one was sticking.
in My Ed30, on a good (legal) motorway run I can get a shade over 36mpg, round town and pootling about it can go as low as 24, but usally 28. does seme to use more in the cold weather though.