The “PROFICIENCY TESTING FOR PETROLEUM PRODUCTS& LUBRICANTS” are organized by the GCC Standardization Organization (GSO) and executed by ASTM International. All participation and shipping fees are paid by GCC Standardization Organization (GSO).
ASTM Proficiency Testing Programs (PTP) are statistical quality assurance programs that enable laboratories to assess their performance in conducting test methods within their own laboratories when their data are compared against other laboratories that participate worldwide in the same program.

1. All costs will be covered by GCC Standardization Organization (GSO).
2. Number of participants is limited— Register early.

Laboratories can choose one or more of the Proficiency Testing Programs for Petroleum Products & Lubricants:

Diesel Fuel: View list at Schedule: February, June, October

Engine Oil Lubricants: View list at Schedule: January, May, September

Gear Oil: View list at Schedule: April, August, December

Fuel Oil: View list at Schedule: January, May, September

Labs can choose one or multible PTP.

Please add the details for the contact information for your organization / conformity assessment bodies.

please define maximum 3 profeiency testing programs which your organization interesting to participate on it in 2020.

We are pleased to hear from you if you have any comment or suggestion.

For more information regarding PT programs organized by GSO, please go thru the following link:

or contact us:

GCC Standardization Organization (GSO)
Ibrahim Al-Hashaf
Acting Head of Notification
Tel: +96611 2746655 Ext: 320.

Tim Brooke
Vice President, Laboratory Services
Tel +1.610.832.9729

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