1990 Mercury Topaz Gas Tank Size & Fuel Capacity
Fuel tank capacity
14.2–15.9gal · 54–60 L
The 1990 Mercury Topaz has a fuel tank capacity of 14.2 to 15.9 gallons (54–60 liters), depending on the trim. The most common size is 15.9 gallons, used on 5 trims.
A full tank is good for roughly 312–477 highway miles or 241–334 miles around town, going by the EPA ratings.
15.9 gal · Smaller than 71% 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 Mercury Topaz fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- Engine
All 9 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| GS 2dr Coupe AWD 2.3L 4cyl 3A · AWD MPG 17 / 22Range 241 / 312 mi | 2.3L 4cyl 3A | AWD | 14.2 gal54 L | 17 / 22 | 241 / 312 mi | |
| GS 4dr Sedan AWD 2.3L 4cyl 3A · AWD MPG 17 / 22Range 241 / 312 mi | 2.3L 4cyl 3A | AWD | 14.2 gal54 L | 17 / 22 | 241 / 312 mi | |
| LS 4dr Sedan AWD 2.3L 4cyl 3A · AWD MPG 17 / 22Range 241 / 312 mi | 2.3L 4cyl 3A | AWD | 14.2 gal54 L | 17 / 22 | 241 / 312 mi | |
| LTS 4dr Sedan AWD 2.3L 4cyl 3A · AWD MPG 17 / 22Range 241 / 312 mi | 2.3L 4cyl 3A | AWD | 14.2 gal54 L | 17 / 22 | 241 / 312 mi | |
| GS 2dr Coupe 2.3L 4cyl 5M · FWD MPG 21 / 30Range 334 / 477 mi | 2.3L 4cyl 5M | FWD | 15.9 gal60 L | 21 / 30 | 334 / 477 mi | |
| GS 4dr Sedan 2.3L 4cyl 5M · FWD MPG 21 / 30Range 334 / 477 mi | 2.3L 4cyl 5M | FWD | 15.9 gal60 L | 21 / 30 | 334 / 477 mi | |
| LS 4dr Sedan 2.3L 4cyl 5M · FWD MPG 21 / 30Range 334 / 477 mi | 2.3L 4cyl 5M | FWD | 15.9 gal60 L | 21 / 30 | 334 / 477 mi | |
| LTS 4dr Sedan 2.3L 4cyl 5M · FWD MPG 21 / 30Range 334 / 477 mi | 2.3L 4cyl 5M | FWD | 15.9 gal60 L | 21 / 30 | 334 / 477 mi | |
| XR5 2dr Coupe 2.3L 4cyl 5M · FWD MPG 21 / 30Range 334 / 477 mi | 2.3L 4cyl 5M | FWD | 15.9 gal60 L | 21 / 30 | 334 / 477 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 Mercury Topaz 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 24 MPG, a full 15.9-gallon tank covers about 382 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 15.9 | 477 | 334 |
| 3/4 | 11.9 | 358 | 250 |
| 1/2 | 8.0 | 239 | 167 |
| 1/4 | 4.0 | 119 | 83 |
| 1/8 | 2.0 | 60 | 42 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 625 gallons, roughly 39 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
- 19–24 MPG
- Tailpipe CO2
- 370–468 g/mi
- Source
- EPA ratings
What it costs to fill up a 1990 Mercury Topaz
$67.89 to fill the 15.9-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 |
|---|---|---|---|---|
| 14.2 gal | Regular | $4.27 | $60.63 | $45.48 |
| 15.9 gal | Regular | $4.27 | $67.89 | $50.92 |
By region, 15.9-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $63.92 |
| Midwest | $4.27 | $67.89 |
| Gulf CoastLowest | $3.70 | $58.83 |
| Rocky Mountain | $4.46 | $70.91 |
| West Coast | $5.42 | $86.18 |
| CaliforniaHighest | $5.89 | $93.65 |
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
- 14.2-gallon tank$60.63
- 15.9-gallon tank$67.89
- A year of driving (15,000 mi)$2,669
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Topaz tank size in other years
1990 is the first Topaz model year we list.
| Model year | Tank | Longest highway range |
|---|---|---|
| 1994 Topaz | 15.9 gal | 477 mi |
| 1993 Topaz | 15.9 gal | 477 mi |
| 1992 Topaz | 15.9 gal | 477 mi |
| 1991 Topaz | 14.2–15.9 gal | 461 mi |
| 1990 Topaz | 14.2–15.9 gal | 477 mi |
1990 Mercury Topaz vs similar 1990 sedans
At 15.9 gallons, the Topaz's largest tank ranks third of the six 1990 sedans compared here. The Nissan Stanza carries the most (16.4 gal) and the Eagle Summit the least (13.2 gal).
| 1990 model | Tank | Longest highway range |
|---|---|---|
| Nissan Stanza | 16.4 gal | 426 mi |
| Mitsubishi Galant | 15.9–16.4 gal | 429 mi |
| Mercury Topaz | 14.2–15.9 gal | 477 mi |
| Ford Tempo | 14.2–15.9 gal | 477 mi |
| Subaru Loyale | 15.9 gal | 461 mi |
| Eagle Summit | 13.2 gal | 409 mi |
Other 1990 sedans of a similar size, one model per brand.
1990 Mercury Topaz fuel system recalls
None of the 1 recall NHTSA lists for the 1990 Mercury Topaz involve the fuel system.
1990 Mercury Topaz fuel pump and gauge parts
NHTSA lists no fuel-system recall for the 1990 Mercury Topaz, 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 Mercury Topaz?
The 1990 Mercury Topaz holds between 14.2 and 15.9 gallons, depending on the trim. 15.9 gallons is the usual size; the smaller 14.2-gallon tank is on the GS 2dr Coupe AWD.
How many gallons and liters does the 1990 Mercury Topaz gas tank hold?
The 1990 Mercury Topaz tank holds 54–60 liters, or 14.2–15.9 gallons in US gallons.
Which 1990 Mercury Topaz has the biggest gas tank?
The 15.9-gallon tank is on the GS 2dr Coupe, GS 4dr Sedan, LS 4dr Sedan and 2 other trims. The smallest tank, 14.2 gallons, is on the GS 2dr Coupe AWD.
Does AWD change the 1990 Mercury Topaz gas tank?
Yes. AWD: 14.2 gal; FWD: 15.9 gal.
How far can a 1990 Mercury Topaz go on a full tank?
About 312–477 miles on the highway and 241–334 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 Mercury Topaz go on a quarter tank?
About 119 highway miles or 83 in town from the 15.9-gallon tank, which has roughly 4.0 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 1990 Mercury Topaz take?
Regular unleaded. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 1990 Mercury Topaz?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 15.9-gallon tank from empty costs $67.89. It ranges from $58.83 in the Gulf Coast to $93.65 in California.
How much does a full tank of gas weigh in a 1990 Mercury Topaz?
About 99 pounds for the 15.9-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 1990 Mercury Topaz have a bigger gas tank than the Ford Tempo?
No, they match: both top out at 15.9 gallons in 1990.
Has the 1990 Mercury Topaz had a fuel pump or fuel system recall?
No. None of the 1 recall NHTSA lists for the 1990 Mercury Topaz 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 (Mercury 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.