... apart from not being a dozy pillock. ;-)
Never done it myself but a good friend who's been driving diesels for years managed it the other days and has had a huge amount if aggro with his insurance company.
A misfuelling preventer seems like a cheap bit of insurance. Anyone got any experience? The Fuelsure seems like it will do the job for not a lot of money. Just a bit odd that the RAC have stopped marketing it.
Tim