prv
Well-known member
What has fuel tank capacity got to do with tax free?
Because if you're genuinely travelling, you can stock up where tax free is available and then use it where it isn't. The FPB boats (long skinny motorboats by Steve Dashew, as mentioned above) have tankage for something like four back-to-back Atlantic crossings without refuelling - somewhere in that distance you're bound to find some cheap fuel.
Pete