PTP Program

In Service Turbine Oil

2024 Annual Fee:

Schedule: February, August
Sample amount distributed each test cycle: 1500 mL used + 100 mL new

Reduced Price

Register for Multiple Programs
A2LA Accredited Symbol

Accredited Proficiency Testing Provider*

This program is accredited in accordance with the recognized International Standard ISO/IEC 17043: 2010 Conformity Assessment - General Requirements for Proficiency Testing, by the American Association for Laboratory Accreditation. Certificate Number: 4209.01

List of Programs and Scopes

About The Program

ASTM International’s In-Service Turbine Oil Proficiency Testing Program for used Turbine Oil provides laboratories with a statistical quality assurance (SQA) tool, enabling them to compare, improve, and maintain, a high level of performance in the use of ASTM methods with other laboratories worldwide.

Conducted two times annually, this program provides a commercially available sample of in-service turbine oil, electronic report forms, and test instructions for each test cycle. Your laboratory performs the ISTO analyses using the published ASTM standard practice cited in the program. All data and related information generated from the program is coded to maintain lab confidentiality.

Test instructions and data report forms are distributed electronically to each participant on the date samples are distributed. Labs have approximately 8 weeks to submit test data with the final statistical summary reports being electronically distributed in approximately 20 business days.

Why Should Your Laboratory Participate?

ASTM's Proficiency Test Program provides you with:

  • A useful and meaningful statistical quality assurance tool to monitor the strengths and weaknesses of your laboratory's performance in conducting testing.
  • The resource you need to satisfy proficiency testing elements of laboratory accreditation.
  • A periodic comparison of test results with other participating laboratories. Make sure your lab results are consistent with other laboratories.

Test Materials

1500 mL of in-service used turbine oil and 100 mL new turbine oil for reference will be provided by the program for each cycle.

Test Parameters

D130 Copper Corrosion
D445 Viscosity
D665 Rusting
D892 Foam Tendency
D974 Acid Number
D1401 Demulsibility/Water Separability
D1500, D7843 Color
D2272 Oxidation Stability (RPVOT)
D5185 Additive Elements
D6304 Water by KF
D6971 Antioxidants
D7414, E2412 Oxidation and Nitration
D7647 Particle Size

NOTE: This list of methods is subject to change, especially if new methods are developed.

Distribution Of Samples

Test samples are prepared and distributed for ASTM International by SGS North America in Deer Park, TX. Program registration fees include the cost of shipping the test samples to U.S. participants or, for international participants, to a third-party shipping agent located in the U.S.

IMPORTANT for International participants: You have the following options for receipt of samples:

  • Ship through a third party shipping agent - Provide ASTM International with the complete contact information of a designated Shipping Agent located in the U.S. who will be responsible for shipping samples from the U.S. to your facility. Participants are responsible for making financial and shipping arrangements directly with the shipping agent.
    • Please be advised that when samples are shipped, an e-mail is sent only to the contact of record on your ASTM PTP account. It is the customer’s responsibility to advise their designated shipper that the sample has been shipped.
    • We cannot permit shipping agents to pick up samples at our distributors’ warehouses.
  • Samples ship directly from the sample distributor via UPS, DHL or FEDEX - Provide ASTM International with your shipping account number to cover shipping charges. Check that your carrier will deliver the test materials to your location. Materials classified as Hazardous may have restrictions.
    • You are responsible for additional fees charged-back to our distributor for any reason relative to your sample shipment including, but not limited to, fees for fuel surcharges, missing/invalid account numbers, dangerous goods, remote area delivery, and multiple delivery attempts.
  • Product Shipment Specs
    • Quantity: 1500 mL + 100 mL
    • Shipping Weight: 5lbs
    • Dimensions: 8x8x11"
    • ECCN: EAR99
    • Harm Code: 2710.19.3030
  • Generic SDS

Program Requirements

Participation is on an annual fee basis and open to all laboratories. Registration fees must be paid in advance to participate. Testing must be performed within the participant's laboratory facilities. (All data and related information generated from the program is coded to maintain lab confidentiality.)


About ASTM International COMMITTEE D02 ON PETROLEUM PRODUCTS, LIQUID FUELS AND LUBRICANTS provides the technical direction for the program. Test information generated through the program is utilized by Committee D02 to determine if modifications to ASTM International methods or new methods are warranted and to analytically review program test results. (All data and related information generated from the program is coded to maintain lab confidentiality.) 

For Additional Information please contact:

Angelique Fontenot - +1-610-832-9748