Oh, and to clarify earlier post, most of the miles have been done with top closed, which will help.
I’m not really bothered by fuel consumption, it’s just a bonus afaic.
Very disappointing!!! ha ha
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Some may say that that practice/comment may need the attention of the moderators 
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I started using Fuelio app in November 2019 (wish I’d started sooner, I now use it to track all maintenance too, plus it’s free) and my 2.0 ND has averaged 37.4 mpg over 9,500 miles since. Best I’ve ever had from a tank is 46.5 mpg (mostly motorway work) and worst is 33 mpg, a handful of long journeys with roof up Iand some average 50 mpg speed check I’ve got over 48 mpg.
However… I’ve not really topped 35 mpg since March this year and more recently I feel the car has been down on power a tad but I can’t decide if that’s in my head. It might just need some new filters and perhaps a brake is binding a tad? Fuelio tells me I fitted wider tyres (215 instead of 205) in February and March so that possibly nerfed my mpg.
Running costs are £0.14 per mile fuel only, £0.33 per mile with maintenance and insurance (not including depreciation or purchase). On average the ND has cost £3.13 per day or £93.55/month. Fuelio gives some interesting (and sometimes scary stats) for example last year I visited the pumps 36 times to put 1006 litres in the tank!
Note: trip computers are optimistic, figures above are calculated from the odometer and fuel receipts. Anyone regularly averaging 42+ mpg in a 2.0 ND must be roof up and driving like Miss Daisy!
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Rather than doing shorter more “spirited” journeys down B roads, today I had to go from Cheshire to The National Motorcycle Museum south of Birmingham on the motorway. With the hood down and not going faster than 75, but most of the time less than that due to traffic, I averaged 46.5mpg (according to the fuel computer) for the 160 mile trip. I like it when you do longer journeys and the distance to empty increases. At the start I had 175 miles to empty and when I got home I still had 75 miles - so I got 60 “free” miles…
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My ND 1.5 Arctic has averaged 53 -55 mpg over the last 18 months, mainly doing the 27 mile round trip to work on A roads.
What’s move remarkable is our other Mazda a CX30 with a standard 2.0 petrol SkyactiveG . In the 3 months and 3000 miles we have achieved over 48mpg in mixed motoring, quite impressive for a bulky “small” car.
Ok, now regularly get 40 to the gallon on my new commute of 28miles.
Usually with the roof down (only put down when any water has run off it, only got really wet once and snowed on twice…).
It does get a little better on Super, but that costs another £9 a week.
I’ll use the posh stuff before it’s MOT…
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I’ve never worried about the mpg of my 1.8 NC, but just done 600 miles around Wales, with a mix of motorway, A and B roads, top down and not hanging about. Throughout I got around 100 miles per quarter of the tank. So I filled up when I got home and did the sums, 40.1mpg. I’m happy with that 
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I have a 2015 1.5 ND 49000 miles Computer mpg at 50.8 . Car is BBR engine remapped and I use mainly Shell V POWER. Always super unleaded.
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That’s more or less on a par with mine (40.5 mpg).
So when someone claims that we must be “driving like Miss Daisy” to get more than 40 mpg, it does crack me up. I don’t hang about either.
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Wow - i’m 30-35mpg ('09 2.0) and that is without ragging it!
I am away to check for holes in my tank!
Hmm, on my old bitsa if I drove it like my Dad it did about 18mpg, but if like I’d just stolen it 35mpg.
No VVT and a big overlap on the valves, therefore it needed plenty of revs for best economy, and incidentally best performance, hence the numerous circumferential lines on the rear tyres, wheelspin even in third sometimes.
A tuned engine is usually happier when driven as designed, and one might find that nursing it gently does it no favours.
Just my thoughts however…
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That could be the reason. However, I couldn’t claim to know if I am running my engine the way it was designed to be, but I know that driving smoothly doesn’t mean driving slowly. 
Agreed!
When accelerating or doing something interesting, use the revs around the peak torque range, not necessarily full throttle, but hear it singing and feel it enjoying itself. OK on a motorway where its boring and zero throttle and then use the highest gear the engine is happy with, not necessarily where the car says to change either.
eg My Mazda3 suggests changing up to 6 at 40mph (1300rpm), but 6th does worse mpg on the monitor than 4th or 5th at that speed. 6th comes into its own above 60mph (2000rpm) with V-power or at 70+ with regular.
Whereas my Dad would change up as soon as possible, keeping it barely ticking over, almost chugging along.
It was painful being in the car with him driving.
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my dad was just the same he would get his triumph Toledo in top gear around 25 mph , the horrible thing would vibrate and drone it was awful
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50.01 mpg on a 110 mile run from Glasgow to north of Loch Lomond and back, finally broke the 50 mpg barrier by virtue of doing those miles mostly at 45 mph stuck behind motor homes…
For the whole 700 mile round trip to/from the English Midlands I averaged 46 mpg, including being stuck in traffic on the A66 and then playing catchup! Did most of the motorway work with my roof up though as I’m getting too old to spend 6 hours in a gale (although not that old, I had Annie Mac’s Dance Party on for most of the drive up, that probably hurt the mpg a bit…)
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Took “Penny” the 2002 Sport for a good rev-limiting Italian Service up Glencoe & back yesterday.
174 miles. Her engine is still 100% tippy tops…having been “over serviced” for 16 years,
I know I can get 34-36-ish out of her if I abuse her reason to exist. Disgraceful.
Yesterday, I achieved a very creditable 23-25-ish.
That’s more like it…
As you were chaps!
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Generally speaking, anywhere between 34 - 41mpg in my 2.0 NC Sport with over 100,000 fully serviced miles on the clock. I get the lower figure when driving briskly. Once saw 45mpg but that was, it seems, a one-off, and has not been repeated since.
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I used to get 35mpg and then I had 4-1 headers and a remap done, now it’s considerably less. 2.0 prht.
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Good lad.
Result.
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