Hallo Duarte,
Wearcheck is a very good and credible used oil analysis laboratory servicing our industry. They are a member of the International Wearcheck group and the following website will take you to the website of a Wearcheck lab operating in your part of the world.
http://www.wearcheckiberica.es/
... WEARCHECK IBÉRICA. ... independence, and comprise from 1990 of the international network Wear Check Group, with license of operation for Italy, Portugal and Spain. ...
I hope this help you.
Good luck