Your car's fuel range display on a full tank

[Vinylseats]

What's the highest range you've seen displayed when filling your car right up with fuel? The most I've ever seen on my Peugeot 208 1.2 is 522 miles to empty after a fill up, having been doing some long distance driving, but the most I've ever truly got out of it is 475 miles before refuelling.

Normally when I fill right up with petrol it displays around 430 miles to empty, which usually turns out as just over 400, with around 20-30 miles range left, so it seems fairly accurate to me.