Against 247 other V6 cars rated 2024–2026, the Grand Wagoneer trails their 21 mpg average by 2 mpg, about $192 a year. Averaged over the years each was sold, the most economical engine since 1984, the 3L 6-cyl (2022–2026), does 17.4 mpg and the thirstiest, the 5.9L 8-cyl (1984–1991), 11: $1,284 a year apart.
Every Jeep Grand Wagoneer engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 3L 6-cyl | 14.8 / 21 | 2022–2026 | $2,207 | |
| 4.2L 6-cyl | 13.8 / 16.5 | 1984–1987 | $2,560 | |
| 6.4L 8-cyl | 13 / 18.3 | 2022–2024 | $2,560 | |
| 5.9L 8-cyl | 10 / 12 | 1984–1991 | $3,491 |
What that actually costs
| Measure | Value |
|---|---|
| Cost per mile (2026) | $0.168 |
| Fuel per year | $2,021 |
| Fuel over five years | $10,105 |
| Against other V6 cars, 2024–2026 | +$192 a year |
| EPA's own estimate | $4,940 a year |
City or highway — who is this car for
The 2026 Jeep Grand Wagoneer gives up 7 mpg in town: 24 on the highway against 17 in the city, $659 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2026) | 17 mpg | $2,259 a year if you only drive in town |
| Highway | 24 mpg | $1,600 a year if you mostly commute |
| Gap | +7 mpg (41%) | Wide — this car dislikes traffic |
How the Grand Wagoneer changed over the years
The Grand Wagoneer peaked in 2026 at 19 mpg (17 city, 24 highway) and was at its thirstiest in 1991 at 11 — 8 mpg apart, or $1,470 a year in fuel between buying one year and the other. The 2026 model gains 2 mpg against 17 for the 2025.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2026 | 17 / 24 | 1 | $2,021 | |
| 2025 | 14 / 20 | 1 | $2,259 | |
| 2024 | 13.5 / 19 | 2 | $2,400 | |
| 2023 | 13.5 / 19 | 2 | $2,400 | |
| 2022 | 14 / 20 | 2 | $2,400 | |
| 1991 | 10 / 12 | 1 | $3,491 | |
| 1990 | 10 / 12 | 1 | $3,491 | |
| 1989 | 10 / 12 | 1 | $3,491 | |
| 1988 | 10 / 12 | 1 | $3,491 | |
| 1987 | 11.5 / 14.5 | 2 | $2,954 | |
| 1986 | 11.5 / 14.5 | 2 | $2,954 | |
| 1985 | 12 / 13.5 | 2 | $3,072 | |
| 1984 | 12.5 / 14.5 | 2 | $2,844 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 20 EPA ratings of the Jeep Grand Wagoneer — 4 engines across 1984–2026. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $4,940. Full method.
Frequently asked questions
What mpg does the 2026 Jeep Grand Wagoneer get?
19 mpg combined, 17 city and 24 highway, per EPA. Across every year since 1984 the Grand Wagoneer has averaged 14 mpg.
Is the 2026 Grand Wagoneer more efficient than the 2025?
Yes: 19 against 17 mpg combined, about $238 a year less to run.
Which Grand Wagoneer year has the best gas mileage?
The 2026, at 19 mpg combined (17 city, 24 highway), which is also the latest model year we hold.
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