No car myself and the wife have owned since the about 2000 has done anthing like the official combined but there again when we bought them we did not epect them to. Our usage has remained pretty much the same and the Actual figures were calculated over at least 35,000 miles except for the Seat Leon which we have only had for 8 months.
2002 Ford Mondeo 2.0 TDCi 130 PS Official combined 47 mpg Actual 38 mpg Diff -20%
2005 Ford Focus C-Max 1.6 TDCi 110 Ps Official Combined 57 mpg Actual 45 mpg Diff -21%
2008 BMW 118D 143PS Official Combined 63 mpg Actual 48 mpg Diff -24%
2010 Kia Ceed SW 1.6 CRDi 115 PS Official Combined 60 mpg Actual 51 mpg Diff -15%
2013 Seat Leon 1.4 TSi 140 PS Official Combined 55 mpg Actual 45 mpg Diff -18%
If we used the car more in town the actual mpg figures would be lower and as I said above being realistic I would accept that.
No manufacturer has overcome the laws of physics despite what the official figures suggest. It still takes pretty much the same amount of bhp to cruise at 70 mph as it has always needed and although the fuel needed to produce that power has reduced slightly due to improved design those improvements are nothing like those indicated in the official figures. Our actual figures do appear to have improved over the years and our RFL bill has plumeted, very happy with that.
But at the end of the day every 1.6 diesel will do about the same mpg so in truth it does not matter which you buy from an economy point of view, just buy the car you like.
All makes have these crazy eco models that have stupidly high figures but the tests are carried out on a rolling road and these eco models are undoubtably optimised to maximise the the test proceedure. In the real world stop/start makes little (if any) difference and the stupidly high gearing the eco warriers are saddled with probably makes things worse on the road since you are forever changing gear.
Anyone who buys a new car simply to save money is immediately onto a looser due to depreciation, no improvement in fuel economy will pay for that.
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