The John Deere S120 fuel tank capacity is 1.19 gal (4.5 L). Half a tank is 0.59 gal (2.3 L), and an empty-to-full refill needs 1 x 5-gal can.
Fuel tank capacity1.19 gal (4.5 L)Empty-to-full tank amount
Half tank0.59 gal (2.3 L)Planning guide
5-gal cans1 x 5-gal can is enough from emptyPortable fuel estimate
John Deere S120 fuel tank capacity specs
Fuel tank capacity
1.19 gal (4.5 L)
Fuel capacity in litres
4.5 L
Half tank amount
0.59 gal (2.3 L)
5-gallon fuel cans
1 x 5-gal can is enough from empty
10-litre fuel jugs
1 x 10-L jug
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 S120 fuel planning notes
Fuel capacity note
For the John Deere S120, fuel tank capacity is 1.19 gal (4.5 L). This helps with fill-up planning, fuel storage and estimating how much fuel to bring to a job.
Refill planning
The John Deere S120 is easiest to plan by container count: 1 x 5-gal can or 1 x 10-L jug. Do not overfill past the filler-neck guidance.
Fuel tank capacity guide
This model
1.19 gal
Guide low
1 gal
Guide typical
2.5 gal
Guide high
5.5 gal
Compared with a broad Lawn / garden tractor guide, not the full tractor dataset.
John Deere S120 fuel capacity FAQ
What is the full tank capacity for the John Deere S120?
The listed fuel capacity for the John Deere S120 is 1.19 gal (4.5 L). Treat it as the full tank size when planning fuel.
How many litres is the John Deere S120 fuel tank?
In litres, the John Deere S120 fuel capacity is about 4.5 L based on the listed 1.19 gal (4.5 L) tank size.
What is half a tank on the John Deere S120?
A half tank on the John Deere S120 works out to roughly 0.59 gal (2.3 L), based on the listed 1.19 gal (4.5 L) full capacity.
Can I fill the John Deere S120 from 5-gallon cans?
The John Deere S120 fuel capacity works out to 1 x 5-gal can or 1 x 10-L jug. A normal top-up usually takes less.
Can the John Deere S120 run all day on one tank?
The John Deere S120 tank size is 1.19 gal (4.5 L), but runtime changes with workload. Fuel use is higher with long grass, wet grass, hills, bagging, towing or high throttle than with short grass, flat ground and steady mowing.
Is the John Deere S120 fuel tank small or large?
The John Deere S120 has a small fuel tank at 1.19 gal (4.5 L), so one or two portable cans may cover a full empty-to-full refill.
Should I top up the John Deere S120 to the filler neck?
The John Deere S120 can take less than 1.19 gal (4.5 L) if it is not fully empty. Do not force extra fuel into the filler neck.
Official information note
Mistakes do happen. Check the operator manual, service manual and official deere.com website for official fuel capacity specifications.
