1990 Lexus LS 400 Gas Tank Size & Fuel Capacity
Fuel tank capacity
22.5gal · 85 L
The 1990 Lexus LS 400 has a fuel tank capacity of 22.5 gallons (85 liters).
A full tank is good for roughly 495 highway miles or 360 miles around town, going by the EPA ratings.
22.5 gal · Bigger than 83% of 1990 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Fuel recalls
- Pump & gauge parts
- FAQ
1990 Lexus LS 400 fuel tank capacity by trim
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 4dr Sedan 4.0L 8cyl 4A · RWD MPG 16 / 22Range 360 / 495 mi | 4.0L 8cyl 4A | RWD | 22.5 gal85 L | 16 / 22 | 360 / 495 mi | |
| No trim matches all of these filters. | ||||||
Tank figures are the manufacturer's rated capacity, sorted smallest tank first. Range is tank size times EPA city or highway MPG.
How far a 1990 Lexus LS 400 goes on a tank
Gallons left and the distance they cover at each mark on the fuel gauge, at EPA city and highway mileage. At the combined rating of 18 MPG, a full 22.5-gallon tank covers about 405 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 22.5 | 495 | 360 |
| 3/4 | 16.9 | 371 | 270 |
| 1/2 | 11.3 | 248 | 180 |
| 1/4 | 5.6 | 124 | 90 |
| 1/8 | 2.8 | 62 | 45 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 833 gallons, roughly 37 full tanks.
Fuel gauges aren't perfectly linear and the low-fuel light comes on with a few gallons still in the tank, so plan your stop before the last eighth.
- EPA combined
- 18 MPG
- Tailpipe CO2
- 494 g/mi
- Source
- EPA ratings
What it costs to fill up a 1990 Lexus LS 400
$96.07 to fill the 22.5-gallon tank from empty with regular, at this week's US average of $4.27 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 22.5 gal | Regular | $4.27 | $96.07 | $72.06 |
By region, 22.5-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $90.45 |
| Midwest | $4.27 | $96.07 |
| Gulf CoastLowest | $3.70 | $83.25 |
| Rocky Mountain | $4.46 | $100.35 |
| West Coast | $5.42 | $121.95 |
| CaliforniaHighest | $5.89 | $132.53 |
Prices: U.S. Energy Information Administration retail averages for the week of October 26, 2026. This week's prices by state and city.
Your own price
- 22.5-gallon tank$96.07
- A year of driving (15,000 mi)$3,558
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
LS 400 tank size in other years
1990 is the first LS 400 model year we list.
| Model year | Tank | Longest highway range |
|---|---|---|
| 1995 LS 400 | 22.5 gal | 518 mi |
| 1994 LS 400 | 22.5 gal | 495 mi |
| 1993 LS 400 | 22.4 gal | 493 mi |
| 1992 LS 400 | 22.5 gal | 473 mi |
| 1991 LS 400 | 22.5 gal | 473 mi |
| 1990 LS 400 | 22.5 gal | 495 mi |
1990 Lexus LS 400 vs similar 1990 sedans
At 22.5 gallons, the LS 400's largest tank ranks fourth of the seven 1990 sedans compared here. The Jaguar XJ-Series carries the most (24.0 gal) and the Volvo 760 the least (21.0 gal).
| 1990 model | Tank | Longest highway range |
|---|---|---|
| Jaguar XJ-Series | 21.6–24.0 gal | 464 mi |
| BMW 7 Series | 21.5–24.0 gal | 480 mi |
| Mercedes-Benz 300-Class | 18.5–23.8 gal | 422 mi |
| Lexus LS 400 | 22.5 gal | 495 mi |
| INFINITI Q45 | 22.5 gal | 450 mi |
| Audi V8 | 21.1 gal | 359 mi |
| Volvo 760 | 15.8–21.0 gal | 420 mi |
Other 1990 sedans of a similar size, one model per brand.
1990 Lexus LS 400 fuel system recalls
None of the 1 recall NHTSA lists for the 1990 Lexus LS 400 involve the fuel system.
1990 Lexus LS 400 fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 1990 Lexus LS 400, so a failed pump or gauge is a normal repair. These are the part numbers the makers list for it.
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Frequently asked questions
What is the fuel tank capacity of the 1990 Lexus LS 400?
The 1990 Lexus LS 400 holds 22.5 gallons (85 liters).
How many gallons and liters does the 1990 Lexus LS 400 gas tank hold?
The 1990 Lexus LS 400 tank holds 85 liters, or 22.5 gallons in US gallons.
How far can a 1990 Lexus LS 400 go on a full tank?
About 495 miles on the highway and 360 miles in town, going from full to empty at its EPA ratings. Expect less in practice, since nobody runs the tank dry.
How many miles can a 1990 Lexus LS 400 go on a quarter tank?
About 124 highway miles or 90 in town from the 22.5-gallon tank, which has roughly 5.6 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 1990 Lexus LS 400 take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 1990 Lexus LS 400?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 22.5-gallon tank from empty costs $96.07. It ranges from $83.25 in the Gulf Coast to $132.53 in California.
How much does a full tank of gas weigh in a 1990 Lexus LS 400?
About 140 pounds for the 22.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 1990 Lexus LS 400 have a bigger gas tank than the Jaguar XJ-Series?
No. The 1990 Jaguar XJ-Series holds up to 24.0 gallons; the 1990 Lexus LS 400 holds up to 22.5.
Has the 1990 Lexus LS 400 had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 1990 Lexus LS 400 involve the fuel system.
Sources
- Tank sizes: manufacturer-rated capacities from US-market specifications, checked against independent references. Updated October 2026.
- MPG and range: EPA ratings (fueleconomy.gov). Range is tank size times EPA MPG.
- Fuel prices: U.S. Energy Information Administration, week of October 26, 2026 (this week's prices).
- Recalls: NHTSA recall database (Lexus fuel system recalls).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.