It's really easy to Google for conversion ratios nowadays, for those who need it.

"You will be given a car of a certain class you have no choice in brand , model, or fuel.---ribcageswkij

The only guarantee we have in life, is death.

https://www.autocar.co.uk/car-review/bmw/3-series/mpg

A BMW 320D 60+ MPG. Not even impressive

https://www.whatcar.com/audi/a3/hatc...-tronic/78733/

Audi A3 automatic
70 MPG

I think your Civic is about the size of a VW golf .

https://www.whatcar.com/volkswagen/g...5dr-dsg/78462/

72 MPG

Like comparing apples and oranges, both tend to be round, but that's about it.

https://www.autocar.co.uk/car-review/bmw/3-series/mpg
"The United States uses a different gallon than the United Kingdom. As a result, miles per gallon measurements are different. This calculator will allow you to convert a U.S. MPG rating to a British Imperial one. Note: Canada uses the British system." (And Trump uses his own system)



U.S. Gallon = 3.785411784 Liters
Imperial Gallon = 4.54609 Liters

Even though I grew up with that system, it no longer makes any sense to me. To talk about mileage (kilometrage?) to any continental European, you will not be understood unless you express yourself in the number of liters used per 100km.

So, Europeans are incapable of simple math? They must have all worldly concepts explained to them in terms they are familiar with, and are able to understand?

No, we just have no desire to be dominated by antiquated measurement systems that the entire world has abandoned. How many leagues can you drive on a tank of gas?

You'll probably have to ask Capt. Nemo. But in essence, a league is similar to, but not quite the same, as a kilometer. I guess some people still weigh themselves in stones too.

<<I guess some people still weigh themselves in stones too.>>

yep. But I don't think it's relevant here.

Wow, some new guys tell us we have to provide links to other parts of the internet to "prove" our views, oh dear it would seem that a link proves owt....

you get what you are given at the rental company

On top of the other dangers in Spain, you may not drive over a white line and you will find cops hang about to catch you doing such a thing.

"Greenies" a whole new word, if you mean that someone believes in man made climate change, then you might use another term the "majority".

Generally, by flying across the pond in a massive aircraft you have already damaged the upper atmosphere more than choosing between petrol and diesel. However, at the moment the concept of clean diesel is awaiting the jury, but generally basic engine science suggests that diesel is more likely to generate micro-particulates and more noxious gases than petrol. These are the things that we accept kill many people on the planet.

Thanks to everyone for all their comments. But quite honestly I was only inquiring about Fuel Mileage vs Fuel cost. All the other comments just show how opinionate we all have become. Enjoy your travels be they by bicycle or jet plane.

Your question did not mention fuel mileage vs. fuel cost. It simply asked for opinions on gas vs. diesel (as stated in your headline). I think you got a good discussion of the pros and cons of both, including limits and attitudes against diesel in some European cities, as well as thoughts on the other side. Although you stimulated a good dialogue, if you wanted something else, it is an example that you should always clearly state what information you are seeking. Safe travels to you, in any event.

That would be pretty short

Diesel is cheaper . It gets better MPG.

And did you read that you do not have any choice?

If you just want a general idea, then: https://about-france.com/driving.htm#Fuel_prices

If you're interested in a particular area, then: https://fr.fuelo.net/?lang=en