1. Bernie Kinker June 14, 2007 RohMax Oil Additives ROBO For ESCIT

2. Overview Phosphorus ROBO Background information Existing data What needs to be done

3. ROBO Background Developed to mimic Sequence IIIGA –Rheology only Specifically used oil TP-1 MRV But also good correlation to pVis –Oxidation chemistry –Fluid volatilization Appears in ILSAC GF-5 draft

4. Phosphorus by ROBO Pros –Bench test –ROBO mimics an engine procedure Chemistry and volatility –‘Free’ procedure (if ROBO were to be included in GF-5) –Already undergoing ASTM development Piggyback precision testing –Can measure both volatile and retained P Cons –Limited background P data Least P data development amongst candidate tests –No field correlation data –Considering the above …. could timeline be met?

5. Data In-Hand RohMax (GM request) –Sequence IIIG matrix oils ExxonMobil –ROBO discriminates between primary and secondary ZDDP ChevronOronite –Two oils

6. ROBO vs Seq IIIG P Retention ASTM Matrix Oil Ca ppm P ppm ROBO % P Retention Seq IIIG EOT 1 % P Retention 434 Fresh EOT 2000 3600 761 1100 80.3 75.8 Ave 71.8 - 79.9 95% CL 435 Fresh EOT 1628 3900 752 1600 88.8 82.1 Ave 78.3 - 85.9 95% CL 438 Fresh EOT 1400 2400 930 1300 81.5 78.0 Ave 72.8 - 83.1 95% CL 1 - Seq IIIG data from Afton ESCIT Presentation 12/12/06

7. ROBO vs Seq IIIG for P Retention ChevronOronite Comments ROBO P retention correlates with IIIG reference oils (courtesy: RohMax and GM) –TMC 43480.3% –TMC 43588.8% –TMC 43881.% Provides an 8.5% separation between 434 and 435

8. ZDDP Type Discrimination Data from ExxonMobil SAE 0W-30 oils / 0.10 % P / 1 0 and 2 0 ZDDP ZDDP Type Ca ppm P ppm P % Retained Primary Fresh ROBOed 2515 4098 993 1542 95.2 Secondary Fresh ROBOed 2512 3545 987 1200 87.9

9. ROBO for P Retention ChevronOronite Information ROBO repeatability is a concern –Two repeats (B) differ by 10% –A third (A) is different only in base stock Will require more study or development

10. What Needs to Be Done A lot Need more data –Field test oils (reference oils) –More on discriminating ZDDP types –Other formulation effects –Precision Severity adjustments?

11. Could ROBO Be Made More Severe? Probably … some thoughts –Temperature –Time –Air flow through system –Oxidation catalysts But significant changes would create a new Phosphorus-ROBO (PROBO) Would negate some advantages –Free test –ASTM procedure development –ASTM precision development

12. What to do ?