With a bit of social engineering... aka "asking someone who works in a McD kitchen"... he could have got the oil cooker temperature and timings.

The McD website, or a pamphlet you can get instore, would list the ingredients.

Anyway, kudos to the writer for doing it the hard way.

Finally, telling a McD fry lover (I put my hand up to that!) that the fries are rubbish is like telling a smoker that cigarettes are bad for them. We know.