I have just heard on the French news that most petrol stations on French motorways will have petrol as it is half term in France.
For some of you based in Brittany around Dinan, only 4 out 6 petrol stations had petrol left last night but petrol stations have just been delivered this morning.
You should find petrol at Leclerc, Carrefour, and Taden Intermarché.
Hurry up though if you are desperate!
Some stations allow you up to 30 liters or up to €30 or €40.