@Brydo I’ve had mines 13 months and anything around 4 or just over is good, it’ll maybe be closer to 3.5 or just under over winter.
We done over 2k going Glasgow to Cornwall, Swansea, up through Wales to Llandudno and home over 10 days and averaged 4 just touring, I also get about 4 as a norm just doing the daily stuff.
I’ve just got back at 1am from 868 miles to Farnborough and got 3.7 but I was myself so speeds were a bit higher than if wife had been there… maybe about 10% over limit keeping up with traffic 😉😉🤫😂