I recently had to stop at a motorway service station for petrol and found they only sold Total, a brand I was not familiar with. I use ordinary unleaded so looked for this. The unleaded pumps were marked 'Total Premium' and 'Total Excellium'. I couldn't see any other indications as to which was the ordinary unleaded and which was the higher octane unleaded, so had to make a guess. Couldn't be a bit more standard in their names for the different grades of petrol?