Sounds interesting, I would love to go back to the island for some laps.
Awesome track, great scenery, a comfortable drive and a nice Chinese resaurant.
I went through about 4 tanks of fuel last year (2 there, 2 return) for travel and plenty on the track. You'll need
to take semi slicks with you as it's to far to drive there on them. I removed the passenger seat
and got 2 tyres in the front and 2 on the back seat and with tools and stuff, you'll carry plenty of weight,
so fuel consumption may be ordinary. Took us about 11 hours to get there in a convoy of zeds, but on return, about 9.