Mehmet:
There is 'tax free' diesel and there is 'cheap' diesel. We did not find anything to be 'cheap' in the tax-free Channel Is., so
buying VAT-free diesel there may not satisfy your goals. Gib seems to be similar from what I hear. Perhaps your best bet is to look on the southern and eastern rims of the
Med, which eliminates
legal complications and might get you a good
price, too. And of course...buy in the
fishing harbors and use a fine sediment/water filter, rather than in the
marinas.
John's
single reported incident aside, when you can buy fuel legally without tax, I'd suggest you do so. Thousands of pleasure vessels visit England's and Scotland's coast each season to load up on diesel at cheaper prices than back home; this is rarely a problem for them. OTOH the UK is likely to lose this tax break for pleasure vessels due to EU pressures, as I understand it - by 2008, if not sooner.
Jack