ASTM D6335 Determination of High Temperature Deposits by Thermo-Oxidation Engine Oil Simulation Test
5. Apparatus
5.1 Thermo-oxidation engine oil simulation test (TEOST) test instrument.

5.2 Balance, capable of weighing to the nearest 0.1 mg.

5.3 Vacuum source, hand held, floor model, or house vacuum.

5.4 Magnetic stirrer and stir bars.

5.5 Digital timer.

5.6 Petroleum and temperature resistant o-rings.

5.7 Ceramic isolators.

5.8 Polypropylene filters.

5.9 Plastic Filter holder.

5.10 Plastic petri dishes, for filter storage.

5.11 Filtering flask - 1000 mL.

5.12 Graduated filter funnel - 500 mL with Luer lock fitting.

5.13 Graduated cylinder - 150 mL.

5.14 Beaker (2) - 25 mL, 600 mL.

5.15 Graduated cylinder - 10 mL.

5.16 Erlenmeyer Flask - 50 mL.

5.17 Adjustable hex wrench.

5.18 Pipe cleaners - 3 x 304.8 mm (12 in.).

5.19 Steel wool - 4/0 (ultra fine).

5.20 Brass brush - 0.22 caliber.

5.21 Glass syringe - 100 uL.

5.22 Tannas one piece cartridge filters (optional, see Note 6).

5.23 Flow meters - Capable of measuring 0 to 10 mL of air per min.

6. Reagents and Materials
6.1 Nitrous Oxide (N2O) - USP compressed gas cylinder, medical grade.

6.2 Moist Air - Hydrocarbon-free air regulated to 103.4 kPa (15 psig) before the flow meter and then bubbled through 30 mL of water in a 50 mL Erlenmeyer flask.

6.3 Ferric Naphthenate - Six percent iron content in mineral spirits.

6.4 Hexane - Industrial grade.

6.5 Low Deposit Reference Oil - CG-1 reference oil is a petroleum oil capable of generating total deposits in the 20 to 30 mg range. The acceptable deposit range of a specific lot is provided by the supplier of that lot.

6.6 Intermediate Deposit Reference Oil - CF-1 reference oil is a petroleum oil capable of generating total deposits in the 50 to 60 mg range. The acceptable deposit range of a specific lot is provided by the supplier of that lot.

6.7 Pump Calibration Fluid - TPC.