Most Emission-Efficient Oil Tankers

Ships ranked by AER (Annual Efficiency Ratio) — grams of CO₂ emitted per tonne of deadweight carried one nautical mile (g CO₂/dwt·nm), the IMO carbon-intensity metric behind the CII rating — from official EU MRV emissions data for reporting year 2024. Lower is greener. Pick a segment and size class to see the greenest vessels first.

Segment rank (2024)

#117 of 1,789 oil tankers

CO₂ intensity

2.1 g CO₂/dwt·nm

vs segment average (5.1)

-58% greener

Bulk Carrier Container Ship Oil Tanker Chemical Tanker Gas Carrier LNG Carrier General Cargo Vehicle Carrier Refrigerated Cargo Ro-Ro Cargo

Sort 🌱 Greenest first 🔧 Least efficient first — retrofit candidates

Size (DWT)

All sizes < 25,000 DWT 25k – 60k DWT 60k – 100k DWT 100k – 200k DWT > 200,000 DWT

Year

2025 2024

1,826

vessels ranked

1.36

greenest (g CO₂/t·nm)

4.12

segment median

#	Vessel	Size (DWT)	Built	Length	Main Engine	Carbon intensity — AER (g CO₂/dwt·nm)	Grade
101	COSFLYING LAKE IMO 9698771	310,421	2015	333 m	CSSC - 7S80ME-C9	2.0	A
103	SEAWAYS DIAMOND HEAD IMO 9727039	301,037	2016	333 m	CSSC - 7G80ME-C9	2.0	A
102	NISSOS KEA IMO 9920758	300,323	2022	330 m	7G80ME-C9-HPSCR	2.0	A
104	AMORE MIO IMO 9926685	299,847	2022	330 m	MAN - 7G80ME-C9	2.0	A
105	EAGLE VICTORIA IMO 9739513	299,392	2016	333 m	Hyundai - 7G80ME-C9	2.0	A
109	AGITOS IMO 9830824	320,784	2019	333 m	Doosan - 7G80ME-C9	2.1	A
108	FOLEGANDROS IMO 9793753	159,221	2018	274 m	Mitsui - 7S65ME-C8.5	2.1	A
107	SEADUCHESS IMO 9876440	313,164	2022	339 m	7G80ME-C9-EGRTC	2.1	A
106	NEW CONSTANT IMO 9708514	318,625	2016	333 m	MAN - 7G80ME-C9	2.1	A
110	NEW COURAGE IMO 9686352	318,989	2015	333 m	MAN - 7G80ME-C9	2.1	A
111	ALMI HERCULES IMO 9583732	319,359	2014	333 m	HHI - 7G80ME-C9.2	2.1	A
112	MAXIM IMO 9604079	296,887	2011	330 m	CSSC - 7S80MC	2.1	A
113	KALLIOPI IMO 9508859	296,659	2010	330 m	CSSC - 7S80MC	2.1	A
116	ILMA IMO 9588392	314,000	2012	333 m	Hyundai - 6S90MC-C	2.1	A
115	PERTAMINA PRIME IMO 9888508	301,781	2021	330 m	Hitachi Zosen Diesel & Engineering 7G80ME-C9.5 HPSCR	2.1	A
114	SEAWAYS TRITON IMO 9734654	300,932	2016	333 m	MAN - 7G80ME-C9	2.1	A
117	CELESTE NOVA IMO 9534054	318,510	2013	333 m	HHI - 7RT- FLEX 84T-D	2.1	A
120	FRONT PRINCE IMO 9788899	301,187	2017	336 m	Doosan - 7G80ME-C9	2.1	A
119	CYPRES IMO 9907445	158,388	2022	274 m	MAN - 6G60ME-C10	2.1	A
118	TEXAS IMO 9623685	299,999	2012	333 m	HHI - 7RT-FLEX82T	2.1	A
121	BABYLON IMO 9878826	299,700	2020	333 m	MAN - 7G80ME-C9	2.1	A
123	FRONT PRINCESS IMO 9788904	301,575	2018	336 m	Hyundai - 7G80ME-C9	2.1	A
122	PACIFIC IMO 9912141	158,405	2022	274 m	MAN - 6G70ME-C10	2.1	A
127	SUR IMO 9870824	299,997	2020	336 m	MAN - 7G80ME-C9	2.2	A
126	FRONT TWEED IMO 9920784	299,986	2022	330 m	7G80ME-C9-HPSCR	2.2	A
125	ARZANAH IMO 9928023	299,425	2023	336 m	7G80ME-C10-GI	2.2	A
124	ANDROMEDA IMO 9352561	321,300	2008	333 m	Wärtsilä - 7RT-flex84T	2.2	A
128	AEGEAN VISION IMO 9645437	158,888	2015	274 m	Hyundai - 6G70ME-C9	2.2	A
129	BRUGGE IMO 9941855	157,138	2023	270 m	Hyundai Heavy Industries Co. Ltd. 6G70ME-C10-HPSCR	2.2	A
131	HORTEN IMO 9740342	297,670	2018	333 m	MAN - 7G80ME-C9	2.2	A
130	OLYMPIC LIGHT IMO 9424273	317,106	2011	333 m	Wärtsilä - 7RT-flex82T	2.2	A
132	SEAWAYS HENDRICKS IMO 9727015	301,014	2016	333 m	MAN - 7G80ME-C9	2.2	A
134	SONANGOL NJINGA MBANDE IMO 9938494	157,663	2023	274 m	Hyundai - 6G70ME-C9	2.2	A
133	EAGLE SAN FRANCISCO IMO 9795127	157,512	2018	277 m	Hyundai - 5X72	2.2	A
135	AS SUWAYQ IMO 9500728	319,478	2012	333 m	HHI - HYUNDAI-WARTSILA 7RT-FLEX82T	2.2	A
136	MARAN ATHENA IMO 9770505	319,398	2016	336 m	Hyundai - 7G80ME-C9	2.2	A
141	GREENWAY IMO 9900796	157,327	2022	274 m	6G70ME-C10-GI	2.2	A
140	SEAWAYS CAPE HENRY IMO 9727003	300,932	2013	333 m	MAN - 7G80ME-C9	2.2	A
139	SEADUKE IMO 9890965	313,051	2021	339 m	Mitsui - 7G80ME-C9.5	2.2	A
138	ADVANTAGE VALUE IMO 9376749	297,556	2009	330 m	CSSC - MAN B&W 7S80MC MK6	2.2	A
137	AZURE NOVA IMO 9602631	319,743	2012	333 m	Hyundai - 6S90ME-C	2.2	A
142	DHALKUT IMO 9888601	300,000	2021	336 m	MAN - 7G80ME-C9	2.2	A
144	YASA SCORPION IMO 9643271	313,998	2013	333 m	HHI - 7RT-FLEX82T	2.2	A
145	DHT AMAZON IMO 9528794	318,130	2011	333 m	HHI - 7RT-FLEX82T	2.2	A
143	AMPHION IMO 9830795	320,784	2019	333 m	MAN - 7G80ME-C9.5 Tier III	2.2	A
147	VL BRILLIANT IMO 9683673	319,300	2014	333 m	MAN - 6G80ME-C9.2	2.3	A
146	XIN DAN YANG IMO 9614048	322,610	2013	333 m	DALIAN MARINE - 7S80ME-C8	2.3	A
149	NEW TREASURE IMO 9799214	307,105	2019	333 m	DALIAN MARINE - 7G80ME-C9	2.3	A
148	BREST IMO 9941867	157,071	2023	270 m	Hyundai Heavy Industries Co. Ltd. 6G70ME-C10-HPSCR	2.3	A
150	HAFEET IMO 9928009	299,425	2023	336 m	7G80ME-C10-GI	2.3	A

Page 3 of 36 — 1,789 vessels

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Engine intelligence

Which engines power the greenest fleets?

The main engine is the single largest CO₂ source on board — typically well over 80% of a ship's emissions come from propulsion. We aggregated this ranking the other way around: every engine design is scored by the measured carbon intensity of the vessels carrying it, licensee-built units merged under their design brand. The verdict from the 2024 data — modern dual-fuel designs like MAN B&W's ME-GI and WinGD's X-DF families, together with EGR/SCR-abated and ultra-long-stroke G-type engines, consistently power the most emission-friendly ships in service.

Emission-friendly engine ranking

AER (Annual Efficiency Ratio) = annual CO₂ emissions ÷ (deadweight × distance sailed), the IMO carbon-intensity metric used for CII ratings. It is built only from measured CO₂, distance and deadweight — not the self-reported cargo transport-work figure, which is unreliable. Implausible outliers (top 2% per segment) are excluded. Grade A–E reflects each vessel's rank within its segment. Source: EMSA THETIS-MRV.