Thermo-Oxidation Engine Oil Simulation Test
Test Methods
  • ASTM D6335 | Dual/33C Model
    (Chinese SH/T0750)
  • ASTM D7097 | MHT® Model
    (Moderately High Temperature)
  • ASTM D8447 | TEOST Turbo®

The TEOST® 33C test simulates the effect of engine operating conditions on the oxidation and deposit-forming tendencies of engine oils, especially in the high-temperature Turbocharger area. The TEOST MHT® test simulates similar effects and conditions found in the ring belt and piston ring areas of the engine.

Oil samples treated with catalysts are pumped over a heated 33C Depositor Rod or a coiled MHT® Depositor Rod on which deposits form. The weight of the Depositor Rod after the test is subtracted from its pre-test weight and added to the particulate weight collected by filtering the oil remaining. The results are reported in milligrams.

  • Adjustable temperature zones and pump speeds.
  • Clear Glass Mantle with MHT™ and Turbo™ tests for easy viewing of depositor area during the test.
  • Ability to collect the volatilized material for further analysis and investigation.
33C Reference Oils | ASTM D6335MHT® Oils & Catalyst | ASTM D7097TEOST® Calibration OilTurbo® | ASTM D8447

For a complete listing of part numbers and available container sizes of Tannas Reference Oils, please review the Tannas Reference Oils & Catalysts Parts List.

Visit our Certified Reference Materials page to download SDS sheets or Oil Certificates.

500700: TEOST® Dual, 110V, 50/60 Hz Power
500800: TEOST® Dual, 220V, 50/60 Hz Power
500400: TEOST® 33C, 110V, 50/60 Hz Power
500500: TEOST® 33C, 220V, 50/60 Hz Power
500100: TEOST MHT®, 110V, 50/60 Hz Power
500200: TEOST MHT®, 220V, 50/60 Hz Power

Depositor Rods:
500020: TEOST® 33C Depositor Rods (10 rods/box)
500021: TEOST MHTurbo® Depositor Rods (10 rods/box)

Optional Accessories:
500990: 33C/Dual Mass Flow Controller
500995: MHT® Mass Flow Controller
500075: Thermocouple Depth Gauge
500070: Two-Channel Chart Recorder – R
500065: Chart Recorder Paper – R
500024: Chart Recorder Pen – Black
500067: Chart Recorder Pen – Red

Spare Parts & Consumables
501000: TEOST Turbo® Parts Assembly
500030: TEOST® Filter Cartridges w/Caps
500612: T/C Main (J-type)
500614: T/C Over-Temp. (K-type)
500409: Depositor Rod O-Rings (20/pack)
500892: Filtering Flask Funnel
500016: Steel Wool
500019: Pipe Cleaners (100/box)
500084: Disposable Pipette
500872: Thermocouple Collar Assembly
200103: Syringe (100 microliters)
500076: Weighing Boats
Allen Keys for cabinet (P/Ns 500610, 500611, 500613)

Contact Tannas for additional spare parts, reference oils, and accessories to run the MHT® and 33C tests.

Depositor Rods crafted from precision machined steel meet Tannas specifications for exclusive use in TEOST® tests. All rods undergo a rigorous inspection and measurement process prior to acceptance.

Mass Flow Controllers, utilized for both TEOST® 33C and MHT® tests, introduce various components to the test oil such as reactive gases and air. The MHT® Mass Flow Controller solely operates with the D7097 test, while the 33C/Dual Mass Flow Controller operates with both ASTM D6335 & D7097 tests.

Get A Quote



Get A Quote

Please contact me by(Required)
Join our mailing list