My husband and I just returned from France and had a TERRIBLE time using our credit cards at gas stations. Most stations are self-service and take only credit cards. Not a single one accepted our US magnetic strip cards and there is NO WAY to pay cash at these places. We spent way too many anxious minutes hunting for stations that had a person in a cashier booth, and then they weren't always able to get our card to work. But at least they took cash. And forget the toll roads (peage). There are no attendants on those roads. We only had one problem using the card in a restaurant and no problems at museums. This all was not only super inconvenient but also more expensive as the exchange rate via the credit card was much better than changing cash currencies (and our card doesn't charge fees for foreign purchases). Good luck to everyone!
Credit card problems in France- real problem PLEASE BE FORWARNED