2005 Lexus IS 300 Gas Tank Size & Fuel Capacity
Fuel tank capacity
17.5gal · 66 L
The 2005 Lexus IS 300 has a fuel tank capacity of 17.5 gallons (66 liters) on every trim.
A full tank is good for roughly 403 highway miles or 280 miles around town, going by the EPA ratings.
17.5 gal · Smaller than 65% of 2005 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Pump & gauge parts
- FAQ
2005 Lexus IS 300 fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Engine
- no difference
All 3 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 4dr Sedan 3.0L 6cyl 5M · RWD MPG 16 / 23Range 280 / 403 mi | 3.0L 6cyl 5M | RWD | 17.5 gal66 L | 16 / 23 | 280 / 403 mi | |
| E-Shift 4dr Sedan 3.0L 6cyl 5A · RWD MPG 16 / 23Range 280 / 403 mi | 3.0L 6cyl 5A | RWD | 17.5 gal66 L | 16 / 23 | 280 / 403 mi | |
| SportCross 4dr Wagon 3.0L 6cyl 5A · RWD MPG 16 / 23Range 280 / 403 mi | 3.0L 6cyl 5A | RWD | 17.5 gal66 L | 16 / 23 | 280 / 403 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 2005 Lexus IS 300 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 17.5-gallon tank covers about 315 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 17.5 | 403 | 280 |
| 3/4 | 13.1 | 302 | 210 |
| 1/2 | 8.8 | 201 | 140 |
| 1/4 | 4.4 | 101 | 70 |
| 1/8 | 2.2 | 50 | 35 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 833 gallons, roughly 48 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 2005 Lexus IS 300
$92.40 to fill the 17.5-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 |
|---|---|---|---|---|
| 17.5 gal | Premium | $5.28 | $92.40 | $69.30 |
By region, 17.5-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $86.27 |
| Midwest | $5.37 | $93.98 |
| Gulf CoastLowest | $4.57 | $79.98 |
| Rocky Mountain | $5.12 | $89.60 |
| West Coast | $6.08 | $106.40 |
| CaliforniaHighest | $6.36 | $111.30 |
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
- 17.5-gallon tank$92.40
- A year of driving (15,000 mi)$4,400
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
IS 300 tank size in other years
The 2005 IS 300 uses the same 17.5 gal tank as every IS 300 since 2001.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2020 IS 300 | 17.4 gal | 522 mi |
| 2019 IS 300 | 17.4 gal | 522 mi |
| 2018 IS 300 | 17.4 gal | 557 mi |
| 2017 IS 300 | 17.4 gal | 452 mi |
| 2016 IS 300 | 17.4 gal | 452 mi |
| 2005 IS 300 | 17.5 gal | 403 mi |
| 2004 IS 300 | 17.5 gal | 403 mi |
| 2003 IS 300 | 17.5 gal | 403 mi |
| 2002 IS 300 | 17.5 gal | 403 mi |
| 2001 IS 300 | 17.5 gal | 368 mi |
2005 Lexus IS 300 vs similar 2005 sedans
At 17.5 gallons, the IS 300's largest tank ranks second of the seven 2005 sedans compared here. The Audi A4 carries the most (18.5 gal) and the Volvo S40 the least (15.9 gal).
| 2005 model | Tank | Longest highway range |
|---|---|---|
| Audi A4 | 16.6–18.5 gal | 574 mi |
| Lexus IS 300 | 17.5 gal | 403 mi |
| Acura TSX | 17.1 gal | 479 mi |
| BMW 3 Series | 16.6 gal | 448 mi |
| Mercedes-Benz C-Class | 16.4 gal | 476 mi |
| Jaguar X-Type | 16.0 gal | 400 mi |
| Volvo S40 | 15.1–15.9 gal | 461 mi |
Other 2005 sedans of a similar size, one model per brand.
2005 Lexus IS 300 fuel pump and gauge parts
These are the part numbers the makers list for the 2005 Lexus IS 300. Check the fuel system recalls first: recall repairs are free.
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Frequently asked questions
What is the fuel tank capacity of the 2005 Lexus IS 300?
The 2005 Lexus IS 300 holds 17.5 gallons (66 liters) on every trim we list.
How many gallons and liters does the 2005 Lexus IS 300 gas tank hold?
The 2005 Lexus IS 300 tank holds 66 liters, or 17.5 gallons in US gallons.
How far can a 2005 Lexus IS 300 go on a full tank?
About 403 miles on the highway and 280 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 2005 Lexus IS 300 go on a quarter tank?
About 101 highway miles or 70 in town from the 17.5-gallon tank, which has roughly 4.4 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2005 Lexus IS 300 take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2005 Lexus IS 300?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 17.5-gallon tank from empty costs $92.40. It ranges from $79.98 in the Gulf Coast to $111.30 in California.
How much does a full tank of gas weigh in a 2005 Lexus IS 300?
About 109 pounds for the 17.5-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2005 Lexus IS 300 have a bigger gas tank than the Acura TSX?
Yes. The 2005 Lexus IS 300 holds up to 17.5 gallons; the 2005 Acura TSX holds up to 17.1.
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).
Does your owner's manual say something different? Let us know and we'll fix it. More on how we check the numbers.