Premium Gas or Regular Gas?

With that said I would much prefer living in the US than France for many reasons (although Nice is the most beautiful city in the world)

 

You just took the average assuming 1 fill up for each. You need to do a weighted average to reflect your real mpg which would be 17.36

 

Put what your sticker says on the gas cap from a quality bunk. Nothing more, nothing less.

 

I agree with the above posters and others.

Was told years ago by a mechanic who said, "Put in what the manual says. You vehicle is designed to run that way. if it calls for regular gas, don't waste your money or high test.". Made sense and no issues.