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KTM are close to that already. Audi do indeed do that already on their cars.
I don’t think many fuel tank capacities are very accurate. I suspect they all quote brimmed to overflowing with no pumps, gauges or pipes in the tank.
it’s not a big problem just something you have to live with. I don’t like riding non stop for hours on end but do wish It did another 20 miles or...