............ and here we see the 3.0 Jaguar in its natural habitat, a fillng station! 🤣
Joking aside, i have an S Type 3.0 and i easily get at least 28mpg from it without trying - the big enemy of good mpg is pootling about at 30mph up and down the gears. Long straight roads, constant speed above 50mph and it gets good figures.
Welcome aboard Daniel, as mentioned above, check for rust on the sills and where they meet the rear wheel arches.