2008 Lexus RX 350 Gas Tank Size & Fuel Capacity
Fuel tank capacity
19.2gal · 73 L
The 2008 Lexus RX 350 has a fuel tank capacity of 19.2 gallons (73 liters) on every trim.
A full tank is good for roughly 422–442 highway miles or 326–346 miles around town, going by the EPA ratings.
19.2 gal · Bigger than 52% of 2008 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Pump & gauge parts
- FAQ
2008 Lexus RX 350 fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Drive
- no difference
All 2 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | MPG city / hwy | Range city / hwy | |
|---|---|---|---|---|---|---|
| 4dr SUV 3.5L 6cyl 5A · FWD MPG 18 / 23Range 346 / 442 mi | 3.5L 6cyl 5A | FWD | 19.2 gal73 L | 18 / 23 | 346 / 442 mi | |
| 4dr SUV AWD 3.5L 6cyl 5A · AWD MPG 17 / 22Range 326 / 422 mi | 3.5L 6cyl 5A | AWD | 19.2 gal73 L | 17 / 22 | 326 / 422 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 2008 Lexus RX 350 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 20 MPG, a full 19.2-gallon tank covers about 384 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 19.2 | 442 | 346 |
| 3/4 | 14.4 | 331 | 259 |
| 1/2 | 9.6 | 221 | 173 |
| 1/4 | 4.8 | 110 | 86 |
| 1/8 | 2.4 | 55 | 43 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 750 gallons, roughly 39 full tanks.
In real driving: owners who log fill-ups at fueleconomy.gov average 23.3 MPG in the RX 350 (7 drivers), about 447 miles on a full 19.2-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
- 19–20 MPG
- Tailpipe CO2
- 444–468 g/mi
- Source
- EPA ratings
What it costs to fill up a 2008 Lexus RX 350
$101.38 to fill the 19.2-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 |
|---|---|---|---|---|
| 19.2 gal | Premium | $5.28 | $101.38 | $76.03 |
By region, 19.2-gallon tank
| Region | Premium / gal | Fill from empty |
|---|---|---|
| East Coast | $4.93 | $94.66 |
| Midwest | $5.37 | $103.10 |
| Gulf CoastLowest | $4.57 | $87.74 |
| Rocky Mountain | $5.12 | $98.30 |
| West Coast | $6.08 | $116.74 |
| CaliforniaHighest | $6.36 | $122.11 |
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
- 19.2-gallon tank$101.38
- A year of driving (15,000 mi)$3,960
Starts at the US average for premium; type in what your station charges. For other tank sizes, use the fill-up calculator.
RX 350 tank size in other years
The 2008 RX 350 uses the same 19.2 gal tank as the 2007 model.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2013 RX 350 | 19.2 gal | 499 mi |
| 2012 RX 350 | 19.2 gal | 480 mi |
| 2011 RX 350 | 19.2 gal | 480 mi |
| 2010 RX 350 | 19.2 gal | 480 mi |
| 2009 RX 350 | 19.2 gal | 442 mi |
| 2008 RX 350 | 19.2 gal | 442 mi |
| 2007 RX 350 | 19.2 gal | 442 mi |
2008 Lexus RX 350 vs similar 2008 SUVs
At 19.2 gallons, the RX 350's largest tank ranks fourth of the seven 2008 SUVs compared here. The HUMMER H3 carries the most (23.0 gal) and the BMW X3 the least (17.7 gal).
| 2008 model | Tank | Longest highway range |
|---|---|---|
| HUMMER H3 | 23.0 gal | 414 mi |
| Lincoln MKX | 19.0–20.0 gal | 456 mi |
| Cadillac SRX | 20.0 gal | 440 mi |
| Lexus RX 350 | 19.2 gal | 442 mi |
| Land Rover LR2 | 18.5 gal | 407 mi |
| Acura RDX | 18.0 gal | 396 mi |
| BMW X3 | 17.7 gal | 407 mi |
Other 2008 SUVs of a similar size, one model per brand.
2008 Lexus RX 350 fuel pump and gauge parts
These are the part numbers the makers list for the 2008 Lexus RX 350. 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 2008 Lexus RX 350?
The 2008 Lexus RX 350 holds 19.2 gallons (73 liters) on every trim we list.
How many gallons and liters does the 2008 Lexus RX 350 gas tank hold?
The 2008 Lexus RX 350 tank holds 73 liters, or 19.2 gallons in US gallons.
Does AWD change the 2008 Lexus RX 350 gas tank?
No. FWD and AWD versions of the 2008 Lexus RX 350 use the same 19.2 gal tank.
How far can a 2008 Lexus RX 350 go on a full tank?
About 422–442 miles on the highway and 326–346 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 2008 Lexus RX 350 go on a quarter tank?
About 110 highway miles or 86 in town from the 19.2-gallon tank, which has roughly 4.8 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
How many miles does a 2008 Lexus RX 350 really get on a tank?
Drivers who log their fill-ups at fueleconomy.gov average 23.3 MPG in the 2008 Lexus RX 350 (7 drivers), which works out to about 447 miles on a full 19.2-gallon tank.
What gas does the 2008 Lexus RX 350 take?
Premium unleaded (required). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2008 Lexus RX 350?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 19.2-gallon tank from empty costs $101.38. It ranges from $87.74 in the Gulf Coast to $122.11 in California.
How much does a full tank of gas weigh in a 2008 Lexus RX 350?
About 119 pounds for the 19.2-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2008 Lexus RX 350 have a bigger gas tank than the BMW X3?
Yes. The 2008 Lexus RX 350 holds up to 19.2 gallons; the 2008 BMW X3 holds up to 17.7.
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.