i managed to get from Leeds to Dillingen an der Donau on 2 tanks with my 1.1... with my dad and sister, and a boot full of luggage.
filled up in Leeds before we set off and once again in Belgium. the route we took was Leeds to Dover, Dover to Calais on the ferry, France, Belgium and then Germany. total distance travelled 845 miles
on the way back, filled up at what was an ex-shell garage about 30 min drive from Dillingen a few days before we set off, all the way through Germany, in to Luxembourg, Belgium where we filled up, France, ferry from Calais to Dover, and then Dover to Leeds, missed the junction on the A1 for the M62 so we went up to the A64 and then in to Leeds. total distance travelled 850 miles.
i was sat at 70-75 all the way in to Germany, where the speed didnt drop below 80-109. i was glad to see that even with a full car i managed to Max my 1.1 on the autobahn