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)

#1,089 of 1,789 oil tankers

CO₂ intensity

4.8 g CO₂/dwt·nm

vs segment average (5.1)

-7% 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
1051	SUNNY APATITE IMO 9721891	49,999	2016	183 m	MAN - 6S50ME-B9	4.6	C
1052	BOTAFOGO IMO 9395329	106,892	2010	244 m	Hudong Heavy Machinery - 6 S 60 MC-C	4.6	C
1053	ARK IMO 9313486	105,804	2008	240 m	MAN - 6S60ME-C	4.6	C
1054	DIYYINAH - I IMO 9487251	74,954	2011	228 m	MAN - 6S60MC-C	4.6	C
1055	NORD MIRAI IMO 9890939	49,995	2021	185 m	MAN - 6S50ME-C9	4.6	C
1056	MINERVA LISA IMO 9276597	103,755	2004	244 m	MAN - 7S60MC	4.6	C
1057	TORM HELLERUP IMO 9798002	114,951	2018	250 m	CSSC - 6G60ME-C9	4.6	C
1058	ADVANTAGE SUMMER IMO 9419890	156,527	2010	274 m	Hyundai - 6S70MC-C	4.6	C
1059	ADVANTAGE SUN IMO 9513141	156,644	2012	274 m	MAN - 6S70MC-C	4.6	C
1060	TORM INTEGRITY IMO 9602710	73,811	2010	229 m	MAN - 5S60MC-C8	4.6	C
1061	TORM EMMA IMO 9592680	75,022	2012	228 m	MAN - 6S60MC-C	4.6	C
1062	KMARIN RIGOUR IMO 9683049	109,475	2016	250 m	MAN - 6G60ME-C9	4.6	C
1063	PGC MARINA IMO 9299563	72,807	2005	228 m	Hudong Heavy Machinery - 6S60MC-C-MKVI	4.6	C
1064	NISSOS KOUFONISSI IMO 9895214	157,447	2021	274 m	MAN - 6G70ME-C9	4.6	C
1065	AFRAMAX RIVIERA IMO 9282912	107,113	2005	247 m	Sulzer - 7RTA62U	4.6	C
1066	MINERVA PISCES IMO 9410179	105,475	2008	244 m	HHI - 6S60MC-C	4.6	C
1067	SOLAR MADELEIN IMO 9882413	49,990	2020	183 m	Hyundai Heavy Industries Co. Ltd. 6G50ME-C9.5-HPSCR TIER III	4.6	C
1068	STAVANGER POSEIDON IMO 9839105	49,999	2020	183 m	Hyundai - 6G50ME-C9 (Tier II)	4.6	C
1069	EMERALD SPIRIT IMO 9422005	109,144	2009	243 m	MAN - 7S60MC	4.7	C
1070	TORM TIMOTHY IMO 9726487	49,757	2013	183 m	MAN - 6G50ME-C9	4.7	C
1071	LILLESAND IMO 9336397	105,786	2007	240 m	Mitsui - 6S60MC-C	4.7	C
1072	TORM SUPREME IMO 9797735	49,999	2017	183 m	Hyundai - 6G50ME-B9	4.7	C
1073	SUEZ ICE SUPREME IMO 9296418	146,356	2007	274 m	MAN - 7S65ME-C	4.7	C
1074	ECLIPSE I IMO 9301536	158,933	2006	274 m	MAN - 6S70MC-C	4.7	C
1075	HAFNIA NANJING IMO 9863235	74,999	2021	228 m	MAN - 6G60ME-C9	4.7	C
1076	TORM EMILIE IMO 9592692	75,013	2013	228 m	MAN - 6S60MC-C	4.7	C
1077	ZENOVIA LADY IMO 9389277	109,999	2009	248 m	Hyundai - 7 S 60 MC	4.7	D
1078	NORDTOKYO IMO 9859208	50,192	2020	183 m	STX Engine Co. Ltd. 6G50ME-C9 Tier III	4.7	D
1079	OLYMPIC SKY IMO 9489297	104,768	2008	244 m	Hudong Heavy Machinery - 6 S 60 MC-C	4.7	D
1080	NAVIG8 MONTIEL IMO 9482861	75,571	2012	229 m	DALIAN MARINE - 6S60MC	4.7	D
1081	SEASENATOR IMO 9304368	105,715	2003	241 m	Hitachi - 6S60MC MK6	4.7	D
1082	NORVIC MONIA IMO 9404936	105,348	2008	244 m	MAN - 6S60MC-C	4.7	D
1083	AFRAPEARL II IMO 9437672	115,897	2010	250 m	MAN - 6S60MC-C	4.7	D
1084	MARE NOSTRUM IMO 9346885	110,295	2009	246 m	Mitsui - 7S60MC	4.7	D
1085	TWERK IMO 9379961	74,268	2008	228 m	Doosan - 6S60MC	4.7	D
1086	RAINBOW SPIRIT IMO 9837171	129,734	2020	277 m	Wärtsilä - 2 x 12V34DF, 2 x 9L34DF	4.7	D
1087	BAYOU SUN IMO 9911537	49,999	2022	186 m	6G50ME-C9-LGIM	4.7	D
1088	AEGEAN HARMONY IMO 9338917	115,824	2007	249 m	MAN - 6S60MC-C	4.7	D
1089	JAG LAXMI IMO 9568196	105,525	2012	244 m	HHI - 6S60MC-C8	4.8	D
1090	PS STARS IMO 9930519	49,999	2022	183 m	Hyundai - 6G50ME-C9	4.8	D
1091	CHEMTRANS POLARIS IMO 9308998	72,291	2005	229 m	Hudong Heavy Machinery - MAN B&W 5S60MC-C	4.8	D
1092	ST.NIKOLAI IMO 9788485	50,129	2018	182 m	Mitsubishi - 6UEC50LSH-EcoC2	4.8	D
1093	MINERVA CLARA IMO 9297333	103,231	2002	244 m	MAN - 7S60MC	4.8	D
1094	ALTERA WIND IMO 9863560	103,118	2021	245 m	Wärtsilä - 8L34DF	4.8	D
1095	YELLOW STARS IMO 9913626	49,999	2021	183 m	MAN - 6G50ME-C9	4.8	D
1096	MERBABU IMO 9388364	105,746	2008	244 m	HHI - 6S60MC-C	4.8	D
1097	TP ENDURANCE IMO 9895197	49,999	2020	183 m	MAN - 6G50ME-C9	4.8	D
1098	TORM EVA IMO 9577109	74,213	2011	228 m	MAN - 6S60MC-C	4.8	D
1099	NOUNOU IMO 9960980	115,322	2023	250 m	MAN - 6G60ME-C10	4.8	D
1100	SAKURA PRINCESS IMO 9358541	105,365	2007	229 m	Sulzer - 6RTA58T	4.8	D

Page 22 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.