> 2. Find some other orifice through which I can pour my 3 litres of
> Amsoil synthetic, and try to forget about the horribly mangled plug, as I
> should never have to drain it again.
>
Well, before you do that you might consider a different oil. I have heard from a couple people that Amsoil is not good synthetic. For one thing it is supposed to be "ester" and not top notch stuff. As possible evidence, I had a perfectly running engine that went bad after one year of amsoil use. I think there is better oil out there than this stuff. Redline is supposed to be one of the best.

If the plug simply won't budge, as a last resort you can pump out the old with a little hand pump. Not the best solution, but it beats permanent fluid.

mark...