Drove from Switzerland to Spain and back on my hols again, and I just wanted to see if I could cross France from Geneva to La Jonquera on the Spanish border without fuelling. I could. Viamichelin quotes the distance as being 630 kms, but my speedo, which reads a bit fast said 674 kms. I cannot calculate the fuel economy accurately for the following reason. I do not know how much a R4 hold when filled right up to the neck, and I forgot to fill it right up to the neck when I got into Spain, but I am chuffed to bits with it!!! Just kept up with the trucks and did the same on the way back.