The John Deere 6120 holds 5 gal (18.9 L) of fuel. The listed fuel type is diesel; half a tank is 2.5 gal (9.5 L), and an empty-to-full refill needs 1 x 5-gal can.
Fuel tank capacity5 gal (18.9 L)Empty-to-full tank amount
Half tank2.5 gal (9.5 L)Planning guide
5-gal cans1 x 5-gal can is enough from emptyPortable fuel estimate
Fuel typedieselUse correct fuel
John Deere 6120 fuel tank capacity specs
Fuel tank capacity
5 gal (18.9 L)
Fuel capacity in litres
18.9 L
Half tank amount
2.5 gal (9.5 L)
5-gallon fuel cans
1 x 5-gal can is enough from empty
10-litre fuel jugs
2 x 10-L jugs
Fuel type
diesel
Estimated full tank fuel weight
35 lb (16 kg) of diesel
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 6120 fuel planning notes
Fuel capacity note
The main fuel number for the John Deere 6120 is 5 gal (18.9 L). Use it as the empty-to-full tank amount, not as a guaranteed runtime figure.
Refill planning
If carrying fuel to the John Deere 6120, budget 1 x 5-gal can or 2 x 10-L jugs for a full empty-to-full refill.
Fuel type note
The listed fuel type for the John Deere 6120 is diesel. Match the fuel type before filling; do not assume every John Deere machine uses diesel.
Full tank weight
A full tank on the John Deere 6120 adds 35 lb (16 kg) of diesel. This is an estimate for fuel weight only, not total machine weight.
Fuel tank capacity guide
This model
5 gal
Guide low
1 gal
Guide typical
2.5 gal
Guide high
5.5 gal
Compared with a broad small fuel tank guide, selected from the listed tank size.
John Deere 6120 fuel capacity FAQ
How much fuel should I buy for the John Deere 6120?
The full fuel tank capacity for the John Deere 6120 is 5 gal (18.9 L). Runtime depends on load, throttle and terrain.
What is the litre conversion for the John Deere 6120 fuel tank?
The John Deere 6120 holds about 18.9 litres of fuel when filled from empty.
How much fuel is half full on the John Deere 6120?
Half-full fuel on the John Deere 6120 is about 2.5 gal (9.5 L). Use the tank gauge as a guide, not a lab instrument.
How many fuel containers does the John Deere 6120 need from empty?
Portable refueling for the John Deere 6120 is roughly 1 x 5-gal can or 2 x 10-L jugs. Bring extra only if you expect long runtime or heavy use.
Does the John Deere 6120 use diesel fuel?
The John Deere 6120 fuel listing shows diesel. Use the correct fuel type and avoid mixing fuels.
Does fuel tank capacity tell me the John Deere 6120 runtime?
Runtime depends on tillage load, PTO load, hydraulic demand, pulling load, transport speed, throttle and field conditions. The 5 gal (18.9 L) tank gives the storage amount, not a fixed hour rating.
What does the John Deere 6120 tank size mean for refueling?
With a listed capacity of 5 gal (18.9 L), the John Deere 6120 is best planned as a small tank for fuel handling.
Official information note
Mistakes do happen. Check the operator manual, service manual and official deere.com website for official fuel capacity specifications.
