It makes a big difference where you are driving. We got over 40 mpg (checked as tank to tank fill) when driving sedately 65-68 on motorway for long drive.Evening folks just bought my first t6 2.0 tdi dsg 2016 camper van set the trip on putting £20 in and it’s only managed 70 miles ! This is driving to work and back steady away . Is this the norm or does it need looking at ?
Then on twisty A roads with lots of change of pace and load it drops to low 30s.