Navalyze · Oil tanker · Ship

MIAOULIS 21

IMO: 9886641
Type: Oil tanker
Average cargo carried: 58,969 t
Flag (estimated): Greece
Port of registry: Piraeus
Technical efficiency: EEXI 2.66 g CO₂/t·nm

ISM company (DoC holder) in 2025: ENESEL S.A. · part of Enesel

Report year

2025 at a glance

From the 2025 THETIS-MRV report. Carries about 58,969 t of cargo on average.

Fuel kg/nm

129

Oil tanker median 129 kg/nm (+1%)

CO₂ per transport work (cargo)

6.87

g CO₂/t·nm · Oil tanker median 7.95 (−14%)

Average speed

12.0 kn

Oil tanker median 10.7 kn (+12%)

Fuel per day at sea

37.2 t/day

Fuel consumed

3,727 t

CO₂ emitted

11,665 t

11,848 t CO₂eq incl. CH₄ and N₂O

Distance sailed

28,794 nm

CO₂ ÷ CO₂ per mile

Time at sea

2,402 h

100 days, 27% 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 129 kg/nm · median 129 (+1%)

76.1Ranks 852 of 1,665, lowest first191

Average speedThis ship 12.0 kn · median 10.7 (+12%)

8.0Faster than 88% of oil tanker ships12.1

CO₂ per transport work (cargo)This ship 6.87 g CO₂/t·nm · median 7.95 (−14%)

4.51Ranks 619 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 ports0%
From the EU39%
Into the EU55%
At berth in the EU6%

53% of this ship's CO₂ falls under the EU ETS (6,211 t).

Fuel burned laden

–

Not reported

CO₂ at berth

756 t

6.5% of the ship's CO₂, alongside in EU ports

Methane (CH₄)

0.2 t

Mainly from LNG; small for oil, biofuel and methanol

CO₂eq uplift

+183 t

+1.6% 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

MIAOULIS 21
Oil tanker median

110.0120.0130.0140.0150.0160.0

’212021’222022’232023’242024’252025

Average speed, kn

MIAOULIS 21
Oil tanker median

6.08.010.012.014.0

’212021’222022’232023’242024’252025

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

MIAOULIS 21
Oil tanker median

4.06.08.010.012.0

’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	+4.7 kn	−15%	+40%	+437%	−42%	4.7 kn faster, fuel per mile down 15%; better than speed alone explains (hull, engine or trade).
2023→2024	−5.0 kn	+28%	−24%	−66%	+18%	5.0 kn slower, fuel per mile up 28%; worse than speed alone explains (fouling, weather, loading or trade).
2022→2023	+1.8 kn	−17%	−3%	−37%	+81%	1.8 kn faster, fuel per mile down 17%; better than speed alone explains (hull, engine or trade).
2021→2022	+0.0 kn	+7%	+8%	+345%	+32%	Same speed, fuel per mile up 7%; worse than speed alone explains (fouling, weather, loading or trade).

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	ENESEL S.A.	3,727	11,665	28,794	2,402	12.0	129	6.87	–
2024	ENESEL S.A.	813	2,546	5,366	734	7.3	152	11.8	–
2023	not published	1,886	5,890	15,863	1,286	12.3	119	10.0	–
2022	not published	3,610	11,331	25,141	2,389	10.5	144	5.52	–
2021	not published	758	2,369	5,645	540	10.5	134	4.17	–

Benchmark and verification

Year	ISM company	CO₂ per TW, g CO₂/t·nm	Oil tanker median	vs Oil tanker	Rank	Verifier	Methods
2025	ENESEL S.A.	6.87	7.95	−14%	619 of 1,665	DNV	A
2024	ENESEL S.A.	11.8	8.06	+46%	1,303 of 1,787	DNV	A
2023	not published	10.0	8.44	+18%	1,109 of 1,797	DNV	B+C
2022	not published	5.52	8.51	−35%	349 of 1,961	DNV	A
2021	not published	4.17	8.86	−53%	104 of 1,789	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.