My wifes 2002 Fiesta 1.4 Zetecs power steering is slightly low. I checked the handbook and it states to use WSA-M2C-195A. Having been to Halfords/motor suppliers, this grade does not seem to be available. Halfords do a 'Ford spec' fluid with the code ESPM 2C 166H.

Can I use this or any universal Ford fluid with no detrimental effect. The 'genuine' Ford fluid is three times the cost of independent makes.