Phase 2 Reformulated Gasoline

                     Performance Subcommittee


                             Final
                         Meeting Summary
                         October 11, 1995


                  California Air Resources Board


I.   Introduction

     The performance subcommittee discussed the following key issues
     regarding the California Reformulated Gasoline (CaRFG) performance and
     compatibility testing program:

          Summary Report for the Board
          Texaco Test Programs
          Preliminary CaRFG Performance and Compatibility Findings
          Other Issues

     Copies of presentations or materials given at this meeting are enclosed with
     this summary.

II.  Summary Report for the Board

     This meeting was held to review what the Performance Subcommittee
     would be presenting to the Advisory Committee.  The draft performance and
     compatibility presentation to the Advisory Committee was shown to
     subcommittee members for their comment and approval.  The presentation
     included the description of the test program, its goals, limitations, and
     preliminary results.  The results included the preliminary historical
     baseline repair analysis, the preliminary fuel economy analysis and the
     preliminary compatibility results from the test programs.  The presentation
     is included with the attachments of meeting materials.

III. Texaco Test Programs

     Texaco conducted two fleet test programs using very low aromatic
     gasoline; one in Bakersfield, California and the other in Beacon, New York.
     Mr. Mike Kulakowski, presented both test programs, but the preliminary
     results of the Bakersfield test were previously discussed at the
     July 18, 1995 Performance Subcommittee Meeting and will not be discussed as
     part of the summary.  However, the presentation given for both test programs
     is included with the attachments.

     The Beacon test program was designed to test the effects of low
     aromatic gasoline on elastomer fuel system components during typical
     consumer service.  The vehicles used in this test were operated by their
     owners in day-to-day service.

     The test comprised 41 vehicles ranging from 1965 to 1992 model years
     for passenger cars and light and medium duty trucks in four technology
     classes.  Each vehicle in the fleet was operated on three fuels: a
     commercially available gasoline ("break in" gasoline) with a typical
     aromatics concentration, a very low aromatic gasoline containing a 5% volume
     concentration and a high aromatic gasoline containing a 48% volume
     concentration. All of the vehicles operated on the "break in" fuel for at
     least 3 weeks prior to the test, and at the beginning of the test program
     half of the vehicles were fueled with low aromatic fuel and the other half
     was fueled with high aromatic fuel.  After three weeks the vehicles on low
     aromatic gasoline switched to high aromatic gasoline and the vehicles on
     high aromatic gasoline switched to low aromatic gasoline for an additional 3
     weeks.  An evaporative emissions test was used on the vehicles before,
     during and after the test program to test for any leaks.

     Texaco's R&D staff preliminarily judged that 3 of the fuel related
     incidents may be attributable, at least in part, to low gasoline aromatics
     concentration.  The three incidents occurred on elastomer components while
     using the 5% aromatics fuel.  The incidents occurred on the following
     vehicles: 1968 Chevrolet Chevelle, 1971 Plymouth Duster, and a 1987 Ford F-250.

IV.  Preliminary CaRFG Performance and Compatibility Findings

     The subcommittee discussed the preliminary findings drafted by the
     ARB, and made some recommendations for changes to be made.  As a result of
     the discussion, an introduction will be added and Performance Subcommittee
     members will have another opportunity to review the findings and provide
     comments before they become final.

V.   Other Issues

     Results from the TRP Seep Task Group will be available soon.  We are
     expecting to receive a letter from Loren Beard of Chrysler and the domestic
     auto manufacturers, stating that seeps documented during the test program
     are normal since they occurred in both test and control vehicles and on
     vehicles outside of the test program.

Attachments

CBG Program Advisory and Subcommittee Activities