The John Deere 9120 holds 270.39 gal (1,023.5 L) of fuel. The listed fuel type is diesel; half a tank is 135.19 gal (511.8 L), and an empty-to-full refill needs about 55 x 5-gal cans.
Fuel tank capacity270.39 gal (1,023.5 L)Empty-to-full tank amount
Half tank135.19 gal (511.8 L)Planning guide
5-gal cansabout 55 x 5-gal cans to have enough fuel from emptyPortable fuel estimate
Fuel typedieselUse correct fuel
John Deere 9120 fuel tank capacity specs
Fuel tank capacity
270.39 gal (1,023.5 L)
Fuel capacity in litres
1,023.5 L
Half tank amount
135.19 gal (511.8 L)
5-gallon fuel cans
about 55 x 5-gal cans to have enough fuel from empty
10-litre fuel jugs
103 x 10-L jugs
Fuel type
diesel
Estimated full tank fuel weight
1,920 lb (871 kg) of diesel
Engine horsepower
280 hp
Engine displacement
496 cu in (8.13 L)
Fuel capacity per horsepower
1 gal per hp
Fuel capacity is a tank-size figure. Actual top-up amount and runtime depend on remaining fuel, workload, throttle use, terrain and machine condition.
John Deere 9120 fuel planning notes
Fuel capacity note
The useful refueling spec here is 270.39 gal (1,023.5 L). It tells you tank size; it does not guarantee hours of operation under load.
Refill planning
If carrying fuel to the John Deere 9120, budget about 55 x 5-gal cans or 103 x 10-L jugs for a full empty-to-full refill.
Fuel type note
The John Deere 9120 fuel type is diesel. Wrong fuel is a much bigger problem than a slightly short top-up.
Full tank weight
A full tank on the John Deere 9120 adds 1,920 lb (871 kg) of diesel. This is an estimate for fuel weight only, not total machine weight.
Engine context
For comparison, the John Deere 9120 engine details listed here are engine horsepower 280 hp, engine displacement 496 cu in (8.13 L), and tank-to-power ratio 1 gal per hp. Tank size alone does not predict fuel use per hour.
Fuel tank capacity guide
This model
270.39 gal
Guide low
150 gal
Guide typical
280 gal
Guide high
420 gal
Compared with a broad 9 Series guide, not the full tractor dataset.
John Deere 9120 fuel capacity FAQ
What fuel tank size is listed for the John Deere 9120?
The empty-to-full fuel amount for the John Deere 9120 is 270.39 gal (1,023.5 L). If the gauge is not on empty, it will take less.
How many litres of fuel does the John Deere 9120 hold?
The John Deere 9120 holds about 1,023.5 litres of fuel when filled from empty.
How many litres is half a tank on the John Deere 9120?
For the John Deere 9120, half of the listed fuel capacity is 135.19 gal (511.8 L). The actual gauge reading may not be perfectly linear.
How many 10-litre jugs fill the John Deere 9120?
For an empty-to-full refill on the John Deere 9120, plan for about 55 x 5-gal cans or 103 x 10-L jugs. Stop at the correct fill level rather than forcing extra fuel in.
Is the John Deere 9120 diesel or gasoline?
The listed fuel type for the John Deere 9120 is diesel. Match the correct fuel before filling the tank.
Can I calculate John Deere 9120 fuel burn from tank size?
You cannot get a reliable runtime from tank size alone. The John Deere 9120 fuel capacity is 270.39 gal (1,023.5 L), but fuel burn depends on field work.
Is the John Deere 9120 fuel tank big enough for regular use?
The John Deere 9120 falls into a large tractor tank range at 270.39 gal (1,023.5 L). Use that to decide whether portable cans or pump refueling makes more sense.
Official information note
Mistakes do happen. Check the operator manual, service manual and official deere.com website for official fuel capacity specifications.
