2003 Mazda MX-5 Miata Gas Tank Size & Fuel Capacity
Fuel tank capacity
12.7gal · 48 L
The 2003 Mazda MX-5 Miata has a fuel tank capacity of 12.7 gallons (48 liters) on every trim.
A full tank is good for roughly 330 highway miles or 254 miles around town, going by the EPA ratings.
12.7 gal · Smaller than 98% of 2003 models we list.
2003 Mazda MX-5 Miata fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 4 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 2dr Roadster 1.8L 4cyl 5M · RWD MPG 20 / 26Range 254 / 330 mi | 1.8L 4cyl 5M | RWD | 12.7 gal48 L | 20 / 26 | 254 / 330 mi | |
| LS 2dr Roadster 1.8L 4cyl 5M · RWD MPG 20 / 26Range 254 / 330 mi | 1.8L 4cyl 5M | RWD | 12.7 gal48 L | 20 / 26 | 254 / 330 mi | |
| SE 2dr Roadster 1.8L 4cyl 6M · RWD MPG 20 / 26Range 254 / 330 mi | 1.8L 4cyl 6M | RWD | 12.7 gal48 L | 20 / 26 | 254 / 330 mi | |
| Shinsen 2dr Roadster 1.8L 4cyl 5M · RWD MPG 20 / 26Range 254 / 330 mi | 1.8L 4cyl 5M | RWD | 12.7 gal48 L | 20 / 26 | 254 / 330 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 2003 Mazda MX-5 Miata 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 23 MPG, a full 12.7-gallon tank covers about 292 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 12.7 | 330 | 254 |
| 3/4 | 9.5 | 248 | 190 |
| 1/2 | 6.4 | 165 | 127 |
| 1/4 | 3.2 | 83 | 64 |
| 1/8 | 1.6 | 41 | 32 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 652 gallons, roughly 51 full tanks.
In real driving: owners who log fill-ups at fueleconomy.gov average 27.9 MPG in the MX-5 Miata (7 drivers), about 354 miles on a full 12.7-gallon tank.
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
- 22–23 MPG
- Tailpipe CO2
- 386–404 g/mi
- Source
- EPA ratings
What it costs to fill up a 2003 Mazda MX-5 Miata
$67.06 to fill the 12.7-gallon tank from empty with premium, at this week's US average of $5.28 a gallon.
| Tank | Fuel | US avg / gal | From empty | From 1/4 tank |
|---|---|---|---|---|
| 12.7 gal | Premium | $5.28 | $67.06 | $50.29 |
By region, 12.7-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $62.61 |
| Midwest | $5.37 | $68.20 |
| Gulf CoastLowest | $4.57 | $58.04 |
| Rocky Mountain | $5.12 | $65.02 |
| West Coast | $6.08 | $77.22 |
| CaliforniaHighest | $6.36 | $80.77 |
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
- 12.7-gallon tank$67.06
- A year of driving (15,000 mi)$3,443
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
MX-5 Miata tank size in other years
The 2003 MX-5 Miata uses the same 12.7 gal tank as every MX-5 Miata since 1999.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2008 MX-5 Miata | 12.7 gal | 356 mi |
| 2007 MX-5 Miata | 12.7 gal | 356 mi |
| 2006 MX-5 Miata | 12.7 gal | 356 mi |
| 2005 MX-5 Miata | 12.7 gal | 330 mi |
| 2004 MX-5 Miata | 12.7 gal | 330 mi |
| 2003 MX-5 Miata | 12.7 gal | 330 mi |
| 2002 MX-5 Miata | 12.7 gal | 330 mi |
| 2001 MX-5 Miata | 12.7 gal | 330 mi |
| 2000 MX-5 Miata | 12.7 gal | 343 mi |
| 1999 MX-5 Miata | 12.7 gal | 343 mi |
| 1997 MX-5 Miata | 12.7 gal | 330 mi |
- 2026
- 2025
- 2024
- 2023
- 2022
- 2021
- 2020
- 2019
- 2018
- 2017
- 2016
- 2015
- 2014
- 2013
- 2012
- 2011
- 2010
- 2009
- 2008
- 2007
- 2006
- 2005
- 2004
- 2003
- 2002
- 2001
- 2000
- 1999
- 1997
- 1996
- 1995
- 1994
- 1993
- 1992
- 1991
- 1990
2003 Mazda MX-5 Miata vs similar 2003 convertibles
The MX-5 Miata has the largest tank of the two 2003 convertibles compared here, 12.7 gallons against 12.7 for the Toyota MR2 Spyder.
| 2003 model | Tank | Longest highway range |
|---|---|---|
| Mazda MX-5 Miata | 12.7 gal | 330 mi |
| Toyota MR2 Spyder | 12.7 gal | 381 mi |
Other 2003 convertibles of a similar size, one model per brand.
Frequently asked questions
What is the fuel tank capacity of the 2003 Mazda MX-5 Miata?
The 2003 Mazda MX-5 Miata holds 12.7 gallons (48 liters) on every trim we list.
How many gallons and liters does the 2003 Mazda MX-5 Miata gas tank hold?
The 2003 Mazda MX-5 Miata tank holds 48 liters, or 12.7 gallons in US gallons.
How far can a 2003 Mazda MX-5 Miata go on a full tank?
About 330 miles on the highway and 254 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 2003 Mazda MX-5 Miata go on a quarter tank?
About 83 highway miles or 64 in town from the 12.7-gallon tank, which has roughly 3.2 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
How many miles does a 2003 Mazda MX-5 Miata really get on a tank?
Drivers who log their fill-ups at fueleconomy.gov average 27.9 MPG in the 2003 Mazda MX-5 Miata (7 drivers), which works out to about 354 miles on a full 12.7-gallon tank.
What gas does the 2003 Mazda MX-5 Miata take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2003 Mazda MX-5 Miata?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 12.7-gallon tank from empty costs $67.06. It ranges from $58.04 in the Gulf Coast to $80.77 in California.
How much does a full tank of gas weigh in a 2003 Mazda MX-5 Miata?
About 79 pounds for the 12.7-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2003 Mazda MX-5 Miata have a bigger gas tank than the Toyota MR2 Spyder?
No, they match: both top out at 12.7 gallons in 2003.
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).
- Real-world MPG: driver-reported fill-ups shared at fueleconomy.gov (My MPG).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.