As others have said, some places you pump your own gas now. Most places they do pump it for you, but as JD said, just watch the exchange rate, but gas will be twice what it is at home, and priced by the liter.

On the Dutch side, all prices are a fixed exchange rate against the dollar. Exchange rates against the Euro can fluctuate. A FEW places will give you 1 to 1 on the dollar on the French side, but not many. The only place I recall getting 1 for 1 this trip was at Hope Market.

Enjoy your trip!