I do 2.5 to 3k miles year in mine, that's general use, laning trips etc. I'm only using for work currently as no traffic and normally use my bike.
I've owned it 7 and a bit years and now has 91k miles. I run 98octane fuel (Tesco momentum99 is a favourite). Have a unichip which is mapped for it.
With buying it, modifying it, changing some mods, maintaining, breaking it, damaging it then fixing it, I've prob spent £10 to £12k or so on it. Plus fuel. I do my own work and where I haven't I've been cashing in favours.
Been in deep water many times, had great fun on lanes and camping etc.
When I can resist the urge to floor it (when the wife is in the passenger seat) on a good run 20 mpg is achievable 60 to 65mph, generally 15 to 18mpg is my average with mixed driving
Round town stop start can kill mpg running 35's so it's a lot of
tyre to get rolling all the time. Other problem is it sounds great setting off! If can reign it in and set off steady etc not too bad round town.
As Chris says when you do the maths a petrol isn't all that bad, I could have spent on a standard diesel what I've spent on mine all in. I got a bargain when bought it.
This is mine
View attachment 165192