2018 Buick Envision Gas Tank Size & Fuel Capacity
Fuel tank capacity
17.3gal · 65 L
The 2018 Buick Envision has a fuel tank capacity of 17.3 gallons (65 liters) on every trim.
A full tank is good for roughly 450–502 highway miles or 346–381 miles around town, going by the EPA ratings.
17.3 gal · Smaller than 55% of 2018 models we list.
- By trim
- Gas cap & parts
- Fuel essentials
- Miles per tank
- Fill-up cost
- Other years
- Compared
- Pump & gauge parts
- FAQ
2018 Buick Envision fuel tank capacity by trim
What changes the tank sizeTap an option to filter the table
- Powertrain
- no difference
- Drive
- no difference
- Engine
- no difference
All 7 trims
MPG and range are city / highway.
| Trim | Engine | Drive | Tank | Fuel | MPG city / hwy | Range city / hwy |
|---|---|---|---|---|---|---|
| 4dr SUV 2.5L 4cyl 6A · FWD · Flex-fuel (gas or E85) MPG 22 / 29Range 381 / 502 mi | 2.5L 4cyl 6A Flex-fuel | FWD | 17.3 gal65 L | Flex-fuelgas or E85 | 22 / 29 | 381 / 502 mi |
| Essence 4dr SUV 2.5L 4cyl 6A · FWD · Flex-fuel (gas or E85) MPG 22 / 29Range 381 / 502 mi | 2.5L 4cyl 6A Flex-fuel | FWD | 17.3 gal65 L | Flex-fuelgas or E85 | 22 / 29 | 381 / 502 mi |
| Essence 4dr SUV AWD 2.5L 4cyl 6A · AWD · Flex-fuel (gas or E85) MPG 21 / 27Range 363 / 467 mi | 2.5L 4cyl 6A Flex-fuel | AWD | 17.3 gal65 L | Flex-fuelgas or E85 | 21 / 27 | 363 / 467 mi |
| Preferred 4dr SUV 2.5L 4cyl 6A · FWD · Flex-fuel (gas or E85) MPG 22 / 29Range 381 / 502 mi | 2.5L 4cyl 6A Flex-fuel | FWD | 17.3 gal65 L | Flex-fuelgas or E85 | 22 / 29 | 381 / 502 mi |
| Preferred 4dr SUV AWD 2.5L 4cyl 6A · AWD · Flex-fuel (gas or E85) MPG 21 / 27Range 363 / 467 mi | 2.5L 4cyl 6A Flex-fuel | AWD | 17.3 gal65 L | Flex-fuelgas or E85 | 21 / 27 | 363 / 467 mi |
| Premium 4dr SUV AWD 2.0L 4cyl Turbo 6A · AWD · Premium (recommended) MPG 20 / 26Range 346 / 450 mi | 2.0L 4cyl Turbo 6A | AWD | 17.3 gal65 L | Premiumrecommended | 20 / 26 | 346 / 450 mi |
| Premium II 4dr SUV AWD 2.0L 4cyl Turbo 6A · AWD · Premium (recommended) MPG 20 / 26Range 346 / 450 mi | 2.0L 4cyl Turbo 6A | AWD | 17.3 gal65 L | Premiumrecommended | 20 / 26 | 346 / 450 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 2018 Buick Envision 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 25 MPG, a full 17.3-gallon tank covers about 433 miles.
| Gauge | Gallons | Highway miles | City miles |
|---|---|---|---|
| Full | 17.3 | 502 | 381 |
| 3/4 | 13.0 | 376 | 285 |
| 1/2 | 8.7 | 251 | 190 |
| 1/4 | 4.3 | 125 | 95 |
| 1/8 | 2.2 | 63 | 48 |
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 600 gallons, roughly 35 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
- 22–25 MPG
- Tailpipe CO2
- 359–400 g/mi
- EPA greenhouse score
- 4–5 of 10
- Source
- EPA ratings
What it costs to fill up a 2018 Buick Envision
$73.87 to fill the 17.3-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 |
|---|---|---|---|---|
| 17.3 gal | Regular | $4.27 | $73.87 | $55.40 |
| 17.3 gal | Premium | $5.28 | $91.34 | $68.51 |
| 17.3 gal | E85 (flex-fuel trims) | $3.31 | $57.26 | $42.95 |
By region, 17.3-gallon tank
| Region | Regular / gal | Fill from empty |
|---|---|---|
| East Coast | $4.02 | $69.55 |
| Midwest | $4.27 | $73.87 |
| Gulf CoastLowest | $3.70 | $64.01 |
| Rocky Mountain | $4.46 | $77.16 |
| West Coast | $5.42 | $93.77 |
| CaliforniaHighest | $5.89 | $101.90 |
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
- 17.3-gallon tank$73.87
- A year of driving (15,000 mi)$2,562
Starts at the US average for regular; type in what your station charges. For other tank sizes, use the fill-up calculator.
Envision tank size in other years
The 2018 Envision uses the same 17.3 gal tank as every Envision since 2016.
| Model year | Tank | Longest highway range |
|---|---|---|
| 2023 Envision | 15.9–16.1 gal | 493 mi |
| 2022 Envision | 15.9–16.1 gal | 493 mi |
| 2021 Envision | 15.9–16.1 gal | 493 mi |
| 2020 Envision | 17.3 gal | 502 mi |
| 2019 Envision | 17.3 gal | 502 mi |
| 2018 Envision | 17.3 gal | 502 mi |
| 2017 Envision | 17.3 gal | 502 mi |
| 2016 Envision | 17.3 gal | 450 mi |
2018 Buick Envision vs similar 2018 SUVs
At 17.3 gallons, the Envision's largest tank ranks third of the seven 2018 SUVs compared here. The Dodge Journey carries the most (21.1 gal) and the Mitsubishi Outlander PHEV the least (11.3 gal).
| 2018 model | Tank | Longest highway range |
|---|---|---|
| Dodge Journey | 20.5–21.1 gal | 513 mi |
| Kia Sorento | 18.8 gal | 526 mi |
| Buick Envision | 17.3 gal | 502 mi |
| Volkswagen Tiguan | 15.3–15.9 gal | 429 mi |
| Jeep Cherokee | 15.8 gal | 474 mi |
| Toyota RAV4 Hybrid | 14.8 gal | 444 mi |
| Mitsubishi Outlander PHEV | 11.3 gal | 294 mi |
Other 2018 SUVs of a similar size, one model per brand.
2018 Buick Envision fuel pump and gauge parts
These are the part numbers the makers list for the 2018 Buick Envision. 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 2018 Buick Envision?
The 2018 Buick Envision holds 17.3 gallons (65 liters) on every trim we list.
How many gallons and liters does the 2018 Buick Envision gas tank hold?
The 2018 Buick Envision tank holds 65 liters, or 17.3 gallons in US gallons.
Does the 2018 Buick Envision tank change with the powertrain?
No. Flex-fuel (E85) and Gas versions of the 2018 Buick Envision use the same 17.3 gal tank.
Does AWD change the 2018 Buick Envision gas tank?
No. AWD and FWD versions of the 2018 Buick Envision use the same 17.3 gal tank.
How far can a 2018 Buick Envision go on a full tank?
About 450–502 miles on the highway and 346–381 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 2018 Buick Envision go on a quarter tank?
About 125 highway miles or 95 in town from the 17.3-gallon tank, which has roughly 4.3 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2018 Buick Envision take?
Flex-fuel (unleaded/E85), or Premium unleaded (recommended), depending on the engine. The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2018 Buick Envision?
At the US average of $4.27 a gallon for regular (EIA, week of October 26, 2026), filling the 17.3-gallon tank from empty costs $73.87. It ranges from $64.01 in the Gulf Coast to $101.90 in California.
How much does a full tank of gas weigh in a 2018 Buick Envision?
About 107 pounds for the 17.3-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2018 Buick Envision have a bigger gas tank than the Toyota RAV4 Hybrid?
Yes. The 2018 Buick Envision holds up to 17.3 gallons; the 2018 Toyota RAV4 Hybrid holds up to 14.8.
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.