1. Slide 1 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Program Field Follow data Test Criteria Test Matrix Results

2. Slide 2 of 13 CONFIDENTIAL April 20, 2004 Caterpillar C13 Field Follow Summary Test Population Percentage High OC Pre-Prod 12152 % Pre-Prod 23318 % Production Iron used for Oil Test C13 Production began Nov 03

3. Slide 3 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Criteria Test Pass/Fail Criteria: 1. No Loss of Oil Consumption Control 2.No stuck rings/Loss of ring side clearance 3.No Liner Scuffing or Bore Polish 4.No Loss of Blowby Control 5.Measured Piston Deposits 6.EOT Oil Quality to be monitored 500 hour – Steady State Test Cycle

4. Slide 4 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Matrix

5. Slide 5 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Matrix Ref 0Ref 1Ref 2 Intermediate Temps 41 % Inc OC, Sluggish Rings 36% Inc OC, Stuck Ring Hot Temps16 % Inc OC, Rings Free 49% Inc OC, Rings Free Low Temps105 % Inc OC, Stuck Rings* 62 % Inc OC Stuck Rings 61 % Inc OC Stuck Ring 78 % Inc OC Rings Free 31% Inc OC, Stuck Rings* * Test started at hot temp for first 100-150 hrs, then switched to Low Temp

6. Slide 6 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Results Summary Discrimination? Temperature sensitivity to deposits validated Field concerns validated through Field Follow Test conditions defined Low Reference Oil (Ref 1) selected High reference being sought –Onus on Oil/Additive Industry to supply

7. Slide 7 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Results Summary

8. Slide 8 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Results Summary

9. Slide 9 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Results Summary

10. Slide 10 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Results Summary

11. Slide 11 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Summary 1.Completing 2 more tests (Potential Ref Comm. Oils) 2.Expected completion May 15. 3.Propose go forward with C13 test for ECF-2 4.Taskforce Approval needed 5.ASTM Approval? 6.Research Report and Test Procedure to be documented

12. Slide 12 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Matrix Plan All Tests to be conducted at the same low temp conditions

13. Slide 13 of 13 CONFIDENTIAL April 20, 2004 Caterpillar ECF-2 Test Matrix Low TempsTLCTLHCTGFTGC2GF Rings Lab 1 Ref 1 Lab 2 Ref 1 Lab 3 Ref 1 Lab 1 Ref X Lab 2 Ref Y Test completed 500 hrs Test completed 300 hrs Test completed 240 hrs