Navalyze · Oil tanker · Ship

STEN SUOMI

IMO: 9378723
Type: Oil tanker
Average cargo carried: 6,152 t
Flag (estimated): Portugal
Port of registry: Madeira
Technical efficiency: EEXI 7.42 g CO₂/t·nm
Ice class: IA

ISM company (DoC holder) in 2025: Rederiet Stenersen AS

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 6,152 t of cargo on average.

Fuel kg/nm

54.9

Oil tanker median 129 kg/nm (−57%)

CO₂ per transport work (cargo)

28.6

g CO₂/t·nm · Oil tanker median 7.95 (+260%)

Average speed

10.3 kn

Oil tanker median 10.7 kn (−4%)

Fuel per day at sea

13.5 t/day

Fuel consumed

2,893 t

CO₂ emitted

9,275 t

9,417 t CO₂eq incl. CH₄ and N₂O

Distance sailed

52,718 nm

CO₂ ÷ CO₂ per mile

Time at sea

5,142 h

214 days, 59% of the year

Within the oil tanker fleet, 2025

Set against all 1,665 oil tanker ships with a full-year 2025 report. Bigger ships burn more per mile but less per tonne of cargo, so read fuel per mile with the ship's size in mind.

Fuel kg/nmThis ship 54.9 kg/nm · median 129 (−57%)

76.1Ranks 53 of 1,665, lowest first191

Average speedThis ship 10.3 kn · median 10.7 (−4%)

8.0Faster than 36% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 28.6 g CO₂/t·nm · median 7.95 (+260%)

4.51Ranks 1,508 of 1,665, lowest first27.7

Middle 80% of shipsMiddle 50%Oil tanker medianThis ship

Where the emissions happen, 2025

THETIS splits each ship's emissions by voyage type. The split sets how much falls under the EU ETS: all of it within the EU and at berth, half of it on voyages into or out of the EU.

Between EU ports81%
From the EU0%
Into the EU0%
At berth in the EU19%

100% of this ship's CO₂ falls under the EU ETS (9,275 t).

Fuel burned laden

–

Not reported

CO₂ at berth

1,735 t

18.7% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.1 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+142 t

+1.5% CO₂eq on top of CO₂ alone, from CH₄ and N₂O; counted in full from 2026

Over the years

Full-year reports only. The Oil tanker median is the middle ship of all oil tanker ships reporting that year; it moves with the fleet, so a ship can gain on it without changing itself.

Fuel kg/nm

STEN SUOMI
Oil tanker median

50.075.0100.0125.0150.0

’182018’192019’202020’212021’222022’232023’242024’252025

Average speed, kn

STEN SUOMI
Oil tanker median

8.09.010.011.0

’182018’192019’202020’212021’222022’232023’242024’252025

CO₂ per transport work (cargo), g CO₂/t·nm

STEN SUOMI
Oil tanker median

0.010.020.030.040.0

’182018’192019’202020’212021’222022’232023’242024’252025

Year on year

Year	Average speed	Fuel kg/nm	Fuel per day at sea	Distance	CO₂ per transport work	Reading
2024→2025	+0.1 kn	−21%	−21%	+56%	+5%	Same speed, fuel per mile down 21%; better than speed alone explains (hull, engine or trade).
2023→2024	+0.6 kn	−11%	−5%	+25%	−23%	0.6 kn faster, fuel per mile down 11%; better than speed alone explains (hull, engine or trade).
2022→2023	+0.3 kn	−0%	+3%	−19%	+5%	Same speed, fuel per mile flat; better than speed alone explains (hull, engine or trade).
2021→2022	−1.4 kn	+18%	+2%	+3%	+28%	1.4 kn slower, fuel per mile up 18%; worse than speed alone explains (fouling, weather, loading or trade).
2020→2021	+0.0 kn	+16%	+16%	−41%	−3%	Same speed, fuel per mile up 16%; worse than speed alone explains (fouling, weather, loading or trade).
2019→2020	+1.5 kn	−5%	+11%	+12%	+1%	1.5 kn faster, fuel per mile down 5%; better than speed alone explains (hull, engine or trade).
2018→2019	+1.1 kn	−1%	+12%	+10%	+5%	1.1 kn faster, fuel per mile flat; better than speed alone explains (hull, engine or trade).

Part-year reports are left out of these comparisons. Fuel per mile rises roughly with the square of speed for a given ship, so a change in speed explains much of a change in fuel per mile.

Every reporting year

One row per THETIS-MRV report. A ship that changed operator during a year has a part-year report for each.

Operation

Year	ISM company	Fuel t	CO₂ t	Distance nm	Hours at seah	Average speedknots at sea	Fuel kg/nmthis ship	CO₂ per transport work (cargo)g/t·nm, this ship	Laden fuel
2025	Rederiet Stenersen AS	2,893	9,275	52,718	5,142	10.3	54.9	28.6	–
2024part-year	Rederiet Stenersen AS	2,254	7,225	32,137	3,171	10.1	70.1	27.2	–
2024	Rederiet Stenersen AS	2,357	7,557	33,747	3,322	10.2	69.8	27.2	–
2023	not published	2,107	6,757	27,023	2,825	9.6	78.0	35.2	–
2022	not published	2,620	8,399	33,457	3,616	9.3	78.3	33.6	–
2021	not published	2,156	6,911	32,370	3,022	10.7	66.6	26.2	–
2020	not published	3,158	10,125	54,922	5,142	10.7	57.5	26.9	–
2019	not published	2,964	9,501	49,112	5,345	9.2	60.3	26.6	–
2018	not published	2,742	8,791	44,786	5,547	8.1	61.2	25.3	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	Rederiet Stenersen AS	28.6	7.95	+260%	1,508 of 1,665	DNV	B+C
2024part-year	Rederiet Stenersen AS	–	–	–	–	DNV	B+C
2024	Rederiet Stenersen AS	27.2	8.06	+238%	1,628 of 1,787	DNV	–
2023	not published	35.2	8.44	+317%	1,691 of 1,797	DNV	A
2022	not published	33.6	8.51	+295%	1,849 of 1,961	DNV	A
2021	not published	26.2	8.86	+195%	1,623 of 1,789	DNV	A
2020	not published	26.9	9.03	+198%	1,692 of 1,870	DNV	A
2019	not published	26.6	8.83	+201%	1,746 of 1,919	DNV	A
2018	not published	25.3	8.86	+186%	1,624 of 1,779	DNV	A

Fuel per mile and CO₂ per tonne-mile are the ship's own reported KPIs. Oil tanker ships are benchmarked on CO₂ per transport work (cargo) (TW), in g CO₂/t·nm. CO₂eq adds methane and nitrous oxide and is in the public files from 2024. Rank counts from the lowest figure among that year's oil tanker ships. Methods: A delivery notes, B tank monitoring, C flow meters, D direct measurement. FuelEU GHG intensity is not shown: it needs fuel types, which the public file does not carry. Operators are named only from 2024, the first year the public files carry them; earlier years belong to the ship, not to any company.