The John Deere 3720 holds 12.79 gal (48.4 L) of fuel. The listed fuel type is diesel; half a tank is 6.39 gal (24.2 L), and an empty-to-full refill needs about 3 x 5-gal cans.
Fuel tank capacity12.79 gal (48.4 L)Empty-to-full tank amount
Half tank6.39 gal (24.2 L)Planning guide
5-gal cansabout 3 x 5-gal cans to have enough fuel from emptyPortable fuel estimate
Fuel typedieselUse correct fuel
John Deere 3720 fuel tank capacity specs
Fuel tank capacity
12.79 gal (48.4 L)
Fuel capacity in litres
48.4 L
Half tank amount
6.39 gal (24.2 L)
5-gallon fuel cans
about 3 x 5-gal cans to have enough fuel from empty
10-litre fuel jugs
5 x 10-L jugs
Fuel type
diesel
Estimated full tank fuel weight
91 lb (41 kg) of diesel
Engine horsepower
44 hp
Engine displacement
91.5 cu in (1.5 L)
Fuel capacity per horsepower
0.291 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 3720 fuel planning notes
Fuel capacity note
The useful refueling spec here is 12.79 gal (48.4 L). It tells you tank size; it does not guarantee hours of operation under load.
Refill planning
If carrying fuel to the John Deere 3720, budget about 3 x 5-gal cans or 5 x 10-L jugs for a full empty-to-full refill.
Fuel type note
The John Deere 3720 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 3720 adds 91 lb (41 kg) of diesel. This is an estimate for fuel weight only, not total machine weight.
Engine context
For comparison, the John Deere 3720 engine details listed here are engine horsepower 44 hp, engine displacement 91.5 cu in (1.5 L), and tank-to-power ratio 0.291 gal per hp. Tank size alone does not predict fuel use per hour.
Fuel tank capacity guide
This model
12.79 gal
Guide low
6 gal
Guide typical
14 gal
Guide high
30 gal
Compared with a broad Compact / small utility tractor guide, not the full tractor dataset.
John Deere 3720 fuel capacity FAQ
What fuel tank size is listed for the John Deere 3720?
The empty-to-full fuel amount for the John Deere 3720 is 12.79 gal (48.4 L). If the gauge is not on empty, it will take less.
How many litres of fuel does the John Deere 3720 hold?
The John Deere 3720 holds about 48.4 litres of fuel when filled from empty.
How many litres is half a tank on the John Deere 3720?
For the John Deere 3720, half of the listed fuel capacity is 6.39 gal (24.2 L). The actual gauge reading may not be perfectly linear.
How many 10-litre jugs fill the John Deere 3720?
For an empty-to-full refill on the John Deere 3720, plan for about 3 x 5-gal cans or 5 x 10-L jugs. Stop at the correct fill level rather than forcing extra fuel in.
Is the John Deere 3720 diesel or gasoline?
The listed fuel type for the John Deere 3720 is diesel. Match the correct fuel before filling the tank.
Can I calculate John Deere 3720 fuel burn from tank size?
You cannot get a reliable runtime from tank size alone. The John Deere 3720 fuel capacity is 12.79 gal (48.4 L), but fuel burn depends on compact tractor work.
Is the John Deere 3720 fuel tank big enough for regular use?
The John Deere 3720 falls into a small / utility-size tank range at 12.79 gal (48.4 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.
