Miles to empty will still no go above 375, even though tank after tank the car will exceed 400 miles. 

 

Also, ran the car down to 15 miles to empty yesterday following 75 cruising motorway miles, managed 47 litres into the tank.. Still 375 miles 

 

Just shy of 60 miles since refuel and its still stuck on 375 miles.. (600km) as the miles to empty. 

 

This refuel was a good test as the 50 miles plus before refuel were all at a steady motorway pace and again after refuel the same route again with a brimmed tank. 

 

I've never seen it report over 375 miles MTE...  It does seem odd..