Big Gav- The Motunui plant was a combined plant that made Methanol and then converted it to synthetic petrol. Whether this is how it is done elsewhere in the world I do not know. The synthetic petrol plant was closed in April 1999. The methanol trains were mothballed, but as the following link shows, it appears Methanex is going to reopen at least one train. http://www.stuff.co.nz/4377887a13.html
Hope this is helpful.
Pique Oil

Thanks.

Now it seems that there will be more gas flowing from offshore Taranaki to replace the declining Maui field it makes sense to start up again - especially given current oil prices...