Car MPG reading vs calculated reading - why the big discrepancy?

I recently purchased a 2015 Vauxhall Astra diesel 1.6 CDTi, attracted by the high quoted MPG of 76 (combined). I always calculate the cars MPG when I fill up, as well as recording the figure the car says....

Are failed injectors common on SEAT Leon 1.6 TDI?

My 2010 SEAT Leon 1.6 TDI is being called in for its emissions fix. But before this could be done my car went into limp mode and a failed injector was diagnosed. Is this common on this car?

Can I reverse the emissions fix by disconnecting the battery?

My SEAT had the "fix", which has ruined the performance and fuel consumption and will likely lead to EGR failure in the future. Can I reset it by disconnecting the battery? Slim hope, I know.

Why do your car reviews still recommend diesels when they're being demonised?

Why do your car reviews still recommend diesels, when London and other European capital cities are making owning diesel cars so much more difficult ?

My Volkswagen is not performing like it was before the emissions fix - what can I do?

Can someone enlighten me as to why my car is not performing as it was before it went in for the emissions fix? The emissions light comes on continually and the coil light is now on an off, plus it keeps...

The emissions fix ruined my SEAT Leon - can Volkswagen reinstate the old engine remap?

I've had the emissions fix done on my SEAT Leon and now the car is a dog. Can Volkswagen reinstate the old engine remap and remove the flow obstructer from the inlet? The car is doing 15 per cent less...

With all the talk about scrapping old diesels - what exactly is considered an 'old' diesel?

There's a lot of talk in the press of scrapping old diesel cars. What constitutes old? Can we put dates or is it defined by emissions?

Has the emissions update ruined my SEAT Ibiza?

I had the emissions update on my SEAT Ibiza 1.6 TDI Sportrider. Eight weeks later, the turbo blew. SEAT tried to blame me by saying there was too much engine oil. I got an oil sample done and the oil was...

Is it standard practice for the limiter to be removed during the emissions fix?

Our 2012 diesel Volkswagen Caddy had its emissions fix and, a week later, it refused to start. RAC identified it as the ERG valve. Volkswagen said to bring it in for a diagnostic test which would be FOC...

Should my next car be petrol or diesel?

I'm looking to buy a new car over the next few months, I do about 13,000 miles a year and am unsure what will be more cost effective. At the moment, I drive a 2007 Ford Fiesta 1.4 TDCi but I'm looking...