I did the petrol in the diesel tank (2 years ago)..... Pulled up at pumps, saw someone I knew,started nattering, picked up nozzle and carried on until full, looked at the nozzle........green ! Oh bugger I said to Mrs Viking who wasn't best pleased as we have probably the most expensive fuel in the Uk. £40.00 on petrol, £25.00 to get it pumped out after a tow in and £48.00 to re-fill. Oh bugger !