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)

#814 of 1,789 oil tankers

CO₂ intensity

3.9 g CO₂/dwt·nm

vs segment average (5.1)

-24% 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
802	ELANDRA BAY IMO 9821691	115,674	2018	250 m	Doosan - 6G60ME-C9	3.8	C
801	OLIB IMO 9334739	108,433	2009	246 m	BRODOSPLIT - 6S70MC-C	3.8	C
803	NOVO IMO 9633446	162,028	2012	274 m	HHI - 6S70MC-C7	3.8	C
804	GALWAY SPIRIT IMO 9312858	105,559	2007	244 m	Hyundai - 6S60MC-C	3.9	C
805	STI SPIGA IMO 9708148	109,999	2015	256 m	MAN - 6G60ME-C9	3.9	C
806	SANMAR SONATINA IMO 9409479	74,997	2008	228 m	Mitsui - 6S60MC	3.9	C
811	PROTEUS TRACY IMO 9923449	109,999	2023	250 m	Wärtsilä - 6X62DF	3.9	C
810	FRONT OCELOT IMO 9726580	109,900	2016	252 m	MAN - 6G60ME-C9	3.9	C
809	ARISTARCHOS IMO 9788394	79,905	2017	219 m	Mitsui - 6S60ME-C8.5	3.9	C
808	NEW ABILITY IMO 9361512	105,381	2008	229 m	Sulzer - 6RTA58T	3.9	C
807	ALICANTE IMO 9527855	115,707	2013	249 m	MAN - 7S60MC-C	3.9	C
812	EPICURUS IMO 9737096	79,945	2017	219 m	Mitsui - 6S60ME-C8	3.9	C
813	AGIOS GERASIMOS IMO 9693056	109,999	2015	250 m	Doosan - 6G60ME-C9	3.9	C
814	ALEXANDER IMO 9826720	113,170	2017	250 m	Hyundai - 7X62DF	3.9	C
818	SEBAROK SPIRIT IMO 9572264	109,554	2011	243 m	Hudong Heavy Machinery - 7 S 60 MC	3.9	C
817	BAKER SPIRIT IMO 9408073	156,928	2009	274 m	Doosan - 6S70MC-C	3.9	C
816	MINERVA OLYMPIA IMO 9787194	114,780	2019	250 m	MAN - 6G60ME-C9.5	3.9	C
815	HAFNIA KALLANG IMO 9766190	74,189	2017	228 m	STX - 6G60ME-C9	3.9	C
819	ABU DHABI-III IMO 9489027	105,131	2011	244 m	Hyundai - 6S60MC-C8	3.9	C
821	GUANYIN IMO 9299707	109,857	2005	244 m	Hyundai - 6S60MC	3.9	C
820	MINERVA GLORIA IMO 9382750	115,873	2009	249 m	MAN - 6S60MC-C	3.9	C
823	MINERVA ARIES IMO 9412177	105,483	2006	244 m	HHI - 6C60MC-C	3.9	C
822	JAG LARA IMO 9488023	105,258	2007	245 m	HHI - 6S60MC-C8	3.9	C
825	ALMI VOYAGER IMO 9579585	157,638	2014	274 m	MAN - 6S70MC-C8	3.9	C
824	DUBAI CHARM IMO 9402495	115,514	2010	250 m	MAN - 6S60MC-C	3.9	C
828	LISBOA IMO 9765158	155,723	2017	279 m	Hyundai - 6S70ME-C8	3.9	C
827	JOSE DO PATROCINIO IMO 9453860	157,055	2007	274 m	MAN - 6S70ME-C	3.9	C
832	SINBAD IMO 9413688	115,928	2009	249 m	Doosan - 6S60MC-C	3.9	C
826	MARETA IMO 9537927	115,795	2013	249 m	Doosan - 7S60MC-C	3.9	C
831	HAI SHANG IMO 9792852	109,900	2018	250 m	Doosan - 6G60ME-C9.5 (Tier II)	3.9	C
830	NEMO IMO 9313498	105,773	2008	240 m	MAN - 6S60ME-C	3.9	C
829	PRIMERO IMO 9741815	106,329	2016	229 m	Mitsui - 6S60MC-C8	3.9	C
833	LANCING IMO 9792046	104,074	2018	229 m	MAN - 6S60ME-C9	3.9	C
836	STI LOMBARD IMO 9708150	109,999	2015	256 m	MAN - 6G60ME-C9	3.9	C
835	SUEZ ENCHANTED IMO 9318084	159,233	2007	274 m	Hyundai - 6S70MC-C	3.9	C
834	SEALEO IMO 9473066	107,505	2012	244 m	MAN - 6S60MC-C	3.9	C
837	NEAPOLIS IMO 9792199	73,937	2018	228 m	Doosan - 6G60ME-C9	3.9	C
842	ALFRED IMO 9826897	113,159	2018	250 m	Hyundai - 7X62DF	4.0	C
841	DUBAI ATTRACTION IMO 9422536	115,459	2011	250 m	Hyundai - 6S60MC-C	4.0	C
840	NISSOS PAROS IMO 9592290	115,722	2010	249 m	Doosan - 6S60MC-C	4.0	C
847	NORTH SEA IMO 9760495	106,340	2016	229 m	Mitsui - 6S60ME-C8	4.0	C
846	NAVIG8 PRESTIGE JKB IMO 9831309	111,000	2019	250 m	CSSC - 6G60ME-C9	4.0	C
845	PACIFIC RAWAN IMO 9772022	109,999	2017	250 m	Doosan - 6G60ME-C9	4.0	C
844	SFL TIGER IMO 9664809	121,225	2015	250 m	MAN - 6S60ME-C8	4.0	C
843	ADAM IMO 9826732	113,226	2018	250 m	Hyundai - 7X62DF	4.0	C
839	DOLPHIN PEARL IMO 9402237	114,824	2006	246 m	MAN - 6S60MC-C	4.0	C
838	CALIDA IMO 9522128	115,812	2008	249 m	Doosan - 7S60MC-C MK7	4.0	C
849	NAMRATA IMO 9401154	105,830	2008	244 m	HHI - 6S60MC-C	4.0	C
848	IONIC ANASSA IMO 9779795	114,718	2016	250 m	Mitsui - 6G60ME-C9.2	4.0	C
850	WHISTLER SPIRIT IMO 9417323	109,011	2006	243 m	Hudong Heavy Machinery - 7S60MC MK	4.0	C

Page 17 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.