Two previous posts which seem to have attracted interest were about the price of petrol and diesel fuel in France and about speed limits there. So here is an update on both subjects.
online database of all retail fuel prices, by location and with a journey planner. This shows that prices away from hypermarkets can be substantially higher.
As far as speed limits are concerned, enforcement is getting stricter with more mobile traps, so read the post from 2011. The AA advice about various items of documentation and equipment needed in France, which should be read, has been updated and confirms that the requirement to carry a breathalyser has been postponed, but that the yellow reflective jacket (gilet jaune) is still obligatoire.