To be quite honest, it isn't difficult and that is why the oil
> companies are so worried. because with a few simple ingredients, that
> you already use when cleaning windows or camping, you can convert
> rapeseed oil to diesel for your car.
This is a spam job, one of those "THIS AMAZING SECRET CAN BE YOURS FOR xxxx" type things, normally I don't point this out as it's usually quite obvious, but this one caught me out and I upped his hit-count by one. I am beating myself with birch canes as I speak.