I think the way MPG is calculated in the European Union gives people false hope as to the economy of a vehicle. It's not the car companies fault, the European Commission came up with a test routine that everyone could follow and everyone would be tested like for like (this is what allowed VW to be a bit naughty...) The official EU tests are completed on a rolling road simulator, so there is no wind, rain, snow etc getting in the way of the test. There are no pedestrians or dogs running out in front of you so no 'real world' problems which wreck your fuel economy. I usually take 20% off the factory quoted figures to give me an idea of what the actual figure will be like. My current M Class with the 250 Bluetech diesel engine averages around 34 MPG (UK gallons @4.5L), the official figures suggest it should be around 40ish. I have averaged over 40 MPG on long runs before which is not bad for what is quite a large car, but nowhere near the factory figures.
I'll be happy if my 220 diesel GLC averages 40MPG.
I like to look at thing at a practical level , i.e. 40mpg (of diesel) would be similar to 32-35 mpg (of gasoline) in terms of $ , because gasoline (in USA) is cheaper than that of diesel . But I believe diesel engine would last longer because it functions like a lubricant for engine. Again, if you don't keep cars forever then it's a mute point
Yeah, that's a good point, you really have to do the maths on MPG/retail price/potential value in 'X' amount of years etc. The more expensive diesel can work out cheaper if you do enough miles to make the MPG work in your favour. We don't get a petrol option for the GLC in the UK at the moment just the 220 & 250 diesels. If they do a 'flying machine' AMG beastie we may get that, who know's ?
Fuel is really odd at the moment in the UK with diesel at my local garage at £00.99 a litre (around $1.43 at current exchange rates) and petrol at £01.01 ($1.45 ish), the cheapest it's been here for quite some time. Diesel is usually a few pence more per litre than petrol but the global market price drop has caused some weird pricing. In the July of last year I paid £1.45 a litre on a remote Scottish Island ! It was worth every penny as the car was gasping...
Back in 2013 the Mrs and myself did a fly drive holiday from Vancouver to San Francisco (not the direct way) and noticed the prices of gas varying wildly depending where you were. The one constant was that it was an awful lot cheaper than back home !
when I traveled a lot for business to Germany and Italy $/gal of gasoline at those countries were 3.5 to 4.0X higher than what we paid here in USA,,, I was told that most of the $$$$ difference is the add-on taxes that they have to pay. I do not know much about $/gal in England... although we had to stay there overnight at the Gatwick (sp?) airport hotel and I was so tired not wanting to take a cap to London (which I should have)
Approximately 70% of the retail price of petrol & diesel in the UK is actually tax. The government really likes motorists here as we also have to pay road tax (an annual charge based on how 'dirty' an engine is) which varies between £0 to £505. When you buy a new vehicle it also has a one off first registration tax, again based on emissions of between £0 to £1,100. And all new cars attract VAT (value added tax) which is 20%...