The 2021 Genesis G80 has a fuel tank capacity of 17.2 to 19.3 gallons (65–73 liters), depending on the trim. The most common size is 19.3 gallons, used on 2 trims.
A full tank is good for roughly 502–550 highway miles or 347–396 miles around town, going by the EPA ratings.
020 gal40 gal
19.3 gal · Bigger than 60% of 2021 models we list.
3.5T 4dr Sedan AWD3.5L 6cyl Turbo 8A · AWDMPG 18 / 26Range 347 / 502 mi
3.5L 6cyl Turbo 8A
AWD
19.3 gal73 L
18 / 26
347 / 502 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 2021 Genesis G80 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 22 MPG, a full 19.3-gallon tank covers about 425 miles.
Gauge
Gallons
Highway miles
City miles
Full
19.3
521
367
3/4
14.5
391
275
1/2
9.7
261
183
1/4
4.8
130
92
1/8
2.4
65
46
Over 15,000 miles a year (the EPA's yearly estimate) this configuration uses about 682 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.
At 19.3 gallons, the G80's largest tank ranks fourth of the seven 2021 sedans compared here. The Porsche Panamera carries the most (23.7 gal) and the Acura TLX the least (15.9 gal).
Other 2021 sedans of a similar size, one model per brand.
2021 Genesis G80 fuel system recalls
NHTSA lists 3 fuel-system recalls for the 2021 Genesis G80, out of 4 recalls in total. A recall applies only to the vehicles named in it, so check your VIN.
Delivery · Hoses, lines/piping, and fittingsApr 10, 2026 · NHTSA 26V229000 · Hyundai Motor America · 94,760 vehicles
Hyundai Motor America (Genesis) is recalling certain Genesis 2022-2026 GV70, 2023-2025 G90, 2021-2025 G80, and GV80 vehicles. Fuel may leak at the pipe connection between the fuel pipe and fuel rail.
Risk and remedy
Risk: A fuel leak increases the risk of a fire.
Remedy: Dealers will inspect and tighten, or replace the fuel pipe as necessary, free of charge. Owner notification letters were mailed beginning July 20, 2026. Owners may contact Genesis customer service at 844-340-9741. Genesis' number for this recall is 033G. Vehicle Identification Numbers (VINs) involved in this recall became searchable on NHTSA.gov beginning April 11, 2026.
Delivery · Fuel pumpSep 11, 2023 · NHTSA 23V630000 · Hyundai Motor America · 19,272 vehicles
Hyundai Motor America (Hyundai) is recalling certain 2021-2022 Genesis G80, GV80, and 2022 Genesis GV70 vehicles. The fuel pump may fail, which can result in a loss of drive power.
Risk and remedy
Risk: A loss of drive power can increase the risk of a crash.
Remedy: Dealers will replace the fuel pump, free of charge. Owner notification letters were mailed November 8, 2023. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 016G.
Delivery · Hoses, lines/piping, and fittingsMar 24, 2021 · NHTSA 21V208000 · Hyundai Motor America · 147 vehicles
Hyundai Motor America (Hyundai) is recalling certain 2021 Genesis G80 and GV80 vehicles equipped with 2.5-litre turbo engines. The fuel tube connecting the high pressure fuel pump to the fuel rail may not seal properly, which could allow fuel to leak.
Risk and remedy
Risk: A fuel leak in the presence of an ignition source can increase the risk of a fire.
Remedy: Hyundai will notify owners, and dealers will replace the high pressure fuel tube, free of charge. Owner notification letters were mailed on May 24, 2021. Owners may contact Hyundai customer service at 1-855-371-9460. Hyundai's number for this recall is 008G.
What is the fuel tank capacity of the 2021 Genesis G80?
The 2021 Genesis G80 holds between 17.2 and 19.3 gallons, depending on the trim. 19.3 gallons is the usual size; the smaller 17.2-gallon tank is on the 2.5T 4dr Sedan.
How many gallons and liters does the 2021 Genesis G80 gas tank hold?
The 2021 Genesis G80 tank holds 65–73 liters, or 17.2–19.3 gallons in US gallons.
Which 2021 Genesis G80 has the biggest gas tank?
The 19.3-gallon tank is on the 3.5T 4dr Sedan, 3.5T 4dr Sedan AWD. The smallest tank, 17.2 gallons, is on the 2.5T 4dr Sedan.
Does AWD change the 2021 Genesis G80 gas tank?
No. RWD and AWD versions of the 2021 Genesis G80 use the same 17.2–19.3 gal tank.
How far can a 2021 Genesis G80 go on a full tank?
About 502–550 miles on the highway and 347–396 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 2021 Genesis G80 go on a quarter tank?
About 130 highway miles or 92 in town from the 19.3-gallon tank, which has roughly 4.8 gallons left at the quarter mark. Gauges aren't exact, so treat that as a guide.
What gas does the 2021 Genesis G80 take?
Premium unleaded (recommended). The label inside the fuel door confirms it for your car.
How much does it cost to fill up a 2021 Genesis G80?
At the US average of $5.28 a gallon for premium (EIA, week of October 26, 2026), filling the 19.3-gallon tank from empty costs $101.90. It ranges from $88.20 in the Gulf Coast to $122.75 in California.
How much does a full tank of gas weigh in a 2021 Genesis G80?
About 120 pounds for the 19.3-gallon tank. Gasoline weighs roughly 6.2 pounds a gallon.
Does the 2021 Genesis G80 have a bigger gas tank than the BMW M5?
No. The 2021 BMW M5 holds up to 20.1 gallons; the 2021 Genesis G80 holds up to 19.3.
Has the 2021 Genesis G80 had a fuel pump or fuel system recall?
Yes. NHTSA lists 3 fuel-system recalls for the 2021 Genesis G80: 26V229000 (delivery · hoses, lines/piping, and fittings); 23V630000 (delivery · fuel pump); 21V208000 (delivery · hoses, lines/piping, and fittings). Check your VIN at nhtsa.gov/recalls to see if your car is affected.
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).