	DEFINITION OF REPORT ABBREVIATIONS
  An explanation of abbreviations used in the Fuel Economy
   Guide and Test Car List reports published by EPA follow:

  Car Line Name and Vehicle ID (Guide and Test Car List)
  
     These are manufacturer-determined descriptors.
	    
	 * Test type 31 data = fuel economy data
	 # Test type 32 data = analytical data

  Engine Description (Guide and Test Car List)
  
     (GUZZLER)              -- Gas Guzzler 
     (POLICE)               -- Police vehicle
     (MPFI), (MPI*)         -- Multipoint fuel injection
     (SPFI)                 -- Single-point fuel injection
     (FFS)                  -- Feedback fuel system
     (TURBO), (TRBO), (TC*) -- Turbocharger
     (S-CHARGE), (SC*)      -- Supercharger
     (DIESEL), (DSL)        -- Diesel
     (ROTARY)               -- Rotary engine
     (VARIABLE)             -- Variable displacement engine
     (NO-CAT)               -- No catalytic converter
     (OHC)                  -- Overhead camshaft
     (OHV)                  -- Overhead valves
     (16-VALVE)             -- 16-valves
     (305)                  -- 305 cubic inch displacement
     (307)                  -- 307 cubic inch displacement
     (M-ENG)                -- One of two 5.8L Ford truck engines
     (W-ENG)                -- One of two 5.8L Ford truck engines
     (GM-BUICK)             -- Engine produced by GM-Buick Motor 
			       Division
     (GM-CHEV)              -- Engine produced by GM-Chevrolet Motor 
			       Division
     (GM-OLDS)              -- Engine produced by GM-Oldsmobile Motor 
			       Division
     (GM-PONT)              -- Engine prodcued by GM-Pontiac Motor 
			       Division
    
  Any other descriptors not listed here are those submitted by 
  manufacturers to augment engine information and may not always 
  be self-explanatory.

  Transmission Descriptors (Guide and Test Car List)
  
    First Character --           OD  (Overdrive Code)
      M    -- Manual                  1 -- No gear ratio < 1.0
      A    -- Automatic               2 -- High gear ratio < 1.0
      L    -- Lockup/automatic
      S    -- Semiautomatic

    Second Character -- Number of forward speeds               
      V    -- Fully variable gear ratios

    Third Character -- (optional, Guide only) 
      C    -- Creeper

  Drive System (Guide and Test Car List) FWD -- Front-wheel drive
					  RWD -- Rear-wheel drive
					  4WD -- Four-wheel drive

 
  Transmission Description (Guide and Test Car List)
								
    EMS         -- Engine management system
    SIL         -- Shift indicator light on instrument panel
    CLKUP       -- Computer-controlled continuously variable lockup
    VLKUP       -- Continuously variable, user-selectable lockup
    nLKUP       -- User-selectable lockup with n (2 through 9) lockup 
		   ranges
    CMODE       -- Computer controlled multimode transmission
    VMODE       -- User-selectable continuously variable transmission
    nMODE       -- Multimode, user-selectable transmission**
		   n = number of gear ranges (2 through 9)
    DC/FW or FW -- Declutching and freewheeling

  **An automatic transmission that has an operator-selectable feature 
    that changes transmission parameters such as gear ratios or automatic 
    transmission shift speed calibrations; e.g.: transmissions with 
    "power" and "economy" modes.

  Fuel System (Guide and Test Car List)
  
    FI    -- Fuel injection
    1     -- 1-barrel carburetor
    2     -- 2-barrel carburetor
    3     -- 3-barrel carburetor
    4     -- 4-barrel carburetor

  Fuel Type (Guide)
  
    P     -- Premium unleaded gasoline
    R     -- Regular unleaded gasoline
    D     -- Diesel fuel

  Control System (Test Car List)
  
    AIR        -- Air Injection
    EM         -- Engine Modification
    FI         -- Fuel Injection
    THM        -- Thermal Reactor
    CAT        -- Catalyst
    TUR, TC*   -- Turbocharger
    EGR        -- Exhaust Gas Recycle
    NON        -- None
    PMP        -- Air Pump
    PLS, PAIR* -- Pulsating Air System
    OXD, OC*   -- Oxidation Catalyst
    RED        -- Reduction Catalyst
    3WY, TWC*  -- Three-way Catalyst
    CLS        -- Closed Loop
    3CL        -- Three-way Catalyst + Closed Loop
    CAI        -- Closed Loop Air Injection
    OTR        -- Other

  *Use of this abbreviation will be phased in at a later date.

