ASTM adds Tannas instrument to new ASTM D8447 Test Method
Photo courtesy of Tannas Co.

ASTM adds Tannas instrument to new ASTM D8447 Test Method

Tannas Co., a global manufacturer of bench testing equipment for the  lubrication industry, announced that recent balloting within ASTM International incorporates the Tannas  TEOST Turbo® instrument into the new ASTM D8447 Turbo Charger Deposits by Thermo Oxidation Engine Oil Simulation Test Method. 

ASTM International, formerly known as American Society for Testing and Materials, is an international standards organization that develops and publishes voluntary consensus technical standards for a wide range of materials, products, systems, and services, based in West Conshohocken, Pennsylvania, U.S.A.

Developed and made exclusively by Tannas Co., the TEOST Turbo® instrument is designed to  predict the elevated temperature deposit forming tendencies of an engine oil subject to the  operating environment more indicative of modern turbochargers. 

As engine designs have evolved over the years, particularly turbochargers, the need for an  additional modification to the TEOST® platform became evident. ASTM D6335, the original  turbocharger bench test, also known as TEOST® 33C, was developed in the early 1990s to  screen engine oils by their tendency to form coking deposits within the elevated temperature  zones of the turbocharger. While the 33C protocol remains relevant for this purpose,  turbocharger deposits that are more oxidative in nature and occur at lower temperatures can  also be a problem, driving the need for a lower temperature test that also retains volatile  components. The TEOST Turbo® test method and instrument were developed to meet this  need. 

“With many auto manufacturers choosing to add turbochargers to their vehicles to improve  fuel efficiency, we knew there was a need to expand the TEOST® platform to better simulate  conditions experienced in these modern turbocharger designs,” says John Bucci, vice president  of Technical Development at The Savant Group. “We are very pleased with the recent news  that the TEOST Turbo® was approved and published by ASTM International. Utilizing the  Tannas TEOST® instrument for this test will benefit OEMs and oil & additive manufacturers due  to its precise, correlative data and the relatively fast testing speed.” 

The bench-top design makes the TEOST Turbo® an affordable option for simulating engine  operating environments and certain field performance conditions. In addition to the adoption  of the TEOST Turbo® into test method D8447, the platform also provides a flexible and  powerful research tool with options to apply custom conditions such as adjustable temperature  zones, pump speeds, catalytic materials, and other modification options to simulate desired  engine operating conditions, the company says.