I had some great meals in France. The key is to stay away from places like Paris. Eat where the regulars eat.
I was in the countryside and ate with commoners.
I used to run some plain old thick STP in my VW Beetle when it got up in mileage. One day the oil pump went out. I drove it slowly several miles home with no oil pressure. New pump and everything back to normal with no ill effect. I think the STP saved the engine.
Same here. I went to an air show at what was Martins State Airport. Too much risky stuff. Never went back. A few years later a stealth plane from a show there went down into the parking lot of a nearby marina that was straight off the runway. Lucky no one killed.