1998 Lexus GS 300/GS 400Fuel Economy & MPG Ratings
Gasoline Midsize CarsRear-Wheel Drive
City
17
MPG
Highway
23
MPG
Combined
19
MPG
Real-World MPG
Based on 2 owner reports via EPA fueleconomy.gov
17.5MPG average-7.9% vs EPA label
EPA combined: 19 MPG · Owner reported avg: 17.5 MPG
Range: 15–21 MPG
Driving mix: City 70% / Highway 30%
Source: EPA fueleconomy.gov “Your MPG” owner submissions. Real-world results vary by driver behavior, conditions, and equipment.
Owner reported MPG for this vehicle averages 17.5 real world MPG based on 2 owner reports. EPA combined rating is 19 MPG.
Trim Comparison
Automatic 5-spd
Premium
City
17
Hwy
23
Comb
19
Fuel cost: $4,300/yr
Automatic 5-spd
Premium
City
15
Hwy
21
Comb
18
Fuel cost: $4,550/yr
| Trim | Engine | City | Hwy | Combined | Fuel Cost/yr |
|---|---|---|---|---|---|
| Automatic 5-spd | Premium | 17 | 23 | 19 | $4,300 |
| Automatic 5-spd | Premium | 15 | 21 | 18 | $4,550 |
Annual Fuel Cost
$4,300
Based on gasoline at $3.67/gal, 15,000 miles/year
5-Year Fuel Savings
$-9,500
vs. average new vehicle
EPA Fuel Economy Score: -1/10
GHG Score: -1/10
Environment
- CO₂ Tailpipe Emissions
- 468 g/mile
- Annual Petroleum Consumption
- 15.7 barrels
Specifications
- Engine
- 4L 6-cyl
- Transmission
- 5-speed Automatic
- Drivetrain
- RWD
- Body Style
- Sedan
- GVWR
- Class 1 (≤6,000 lbs)
Source: EPA fuel economy data & NHTSA vPIC. Specifications reflect the most common trim configuration.
Engine & Efficiency Details
Source: EPA fueleconomy.gov
- Engine Size
- 3L, 6-cylinder
- Fuel Type
- Premium Gasoline
Annual Fuel Cost by State
Prices as of week ending May 18, 2026 · Source: EIA
National AvgEPA default
$4.490/gal$3,545/yr
California
$5.957/gal$4,703/yr
Texas
$3.888/gal$3,069/yr
Florida
$4.136/gal$3,265/yr
New York
$4.522/gal$3,570/yr
Ohio
$4.510/gal$3,561/yr
Washington
$5.591/gal$4,414/yr
Colorado
$4.618/gal$3,646/yr
Minnesota
$4.344/gal$3,429/yr
Massachusetts
$4.448/gal$3,512/yr
| State | Gas Price | Annual Cost | vs. National Avg |
|---|---|---|---|
| National AvgEPA default | $4.490/gal | $3,545/yr | — |
| California | $5.957/gal | $4,703/yrHIGHEST | +$1,158 |
| Texas | $3.888/gal | $3,069/yrLOWEST | $-476 |
| Florida | $4.136/gal | $3,265/yr | $-280 |
| New York | $4.522/gal | $3,570/yr | +$25 |
| Ohio | $4.510/gal | $3,561/yr | +$16 |
| Washington | $5.591/gal | $4,414/yr | +$869 |
| Colorado | $4.618/gal | $3,646/yr | +$101 |
| Minnesota | $4.344/gal | $3,429/yr | $-116 |
| Massachusetts | $4.448/gal | $3,512/yr | $-33 |
Calculated at 15,000 miles/year (EPA standard assumption) using 19 MPG combined. Regular gasoline prices. Actual costs vary.
Related
Lexus GS 300/GS 400 MPG History
See how this model's fuel economy changed by year