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)

#928 of 1,789 oil tankers

CO₂ intensity

4.2 g CO₂/dwt·nm

vs segment average (5.1)

-18% 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
901	IONIC ASPIS IMO 9523287	107,508	2011	244 m	MAN - 6S60MC-C	4.1	C
902	BONITA IMO 9297541	108,386	2006	247 m	MAN - 7S60MC-C	4.1	C
903	PALLADIUM IMO 9773923	113,221	2017	250 m	Hyundai - 6S70ME-C9	4.1	C
904	CATALAN SEA IMO 9577044	116,620	2012	250 m	MAN - 6S70MC	4.1	C
905	ANDRE REBOUCAS IMO 9453846	157,055	2015	274 m	MAN - 6S70ME-C	4.1	C
906	HUA LIN WAN IMO 9614086	109,475	2012	245 m	Wärtsilä - 7RT-flex58T	4.1	C
907	SCORPIO IMO 9389071	107,157	2009	244 m	Hudong Heavy Machinery - 6 S 60 MC-C	4.1	C
908	AMAZON VICTORY IMO 9660358	72,412	2012	228 m	HHI - 5G60ME-C9.2	4.1	C
909	JAG AANCHAL IMO 9390161	74,811	2008	228 m	STX - STX-MAN 6S60MC-C	4.1	C
910	GREEN ATTITUDE IMO 9808156	112,532	2018	250 m	Hyundai - 6G60ME-C9	4.1	C
911	YINGHAO CONFIDENCE IMO 9389978	107,600	2010	244 m	Mitsubishi - 6S60MC-C	4.1	C
912	JAARLI IMO 9892432	112,459	2021	249 m	MAN - 6G60ME-C9	4.1	C
913	AMAZON IMO 9476654	149,999	2011	274 m	Hyundai - 6S70MC	4.1	C
914	SFL PANTHER IMO 9664782	115,238	2015	250 m	MAN - 6S60ME-C8	4.1	C
915	HAFNIA SHINANO IMO 9506069	76,594	2008	229 m	DALIAN MARINE - 6S60MC	4.1	C
916	IASONAS IMO 9419357	115,500	2006	250 m	STX - STX-MAN B&W 6S60MC-C MK8	4.1	C
917	DONEGAL SPIRIT IMO 9312846	105,611	2006	244 m	Hyundai - 7 S 60 MC	4.1	C
918	SEA SENOR IMO 9308950	109,647	2006	245 m	Sulzer - 7RTA62U	4.1	C
919	LUCKY TRADER IMO 9952608	49,813	2021	183 m	STX - 6G50ME-C9	4.1	C
920	CSK VANGUARD IMO 9728423	114,667	2013	250 m	Mitsui - 6G60ME-C9.2 (Tier II)	4.1	C
921	STI OXFORD IMO 9697595	109,999	2015	256 m	MAN - 6G60ME-C9	4.1	C
922	DELTA STAR IMO 9458016	115,618	2013	249 m	MAN - 6S60MC-C	4.1	C
923	CIELO BIANCO IMO 9778296	74,999	2017	228 m	Hyundai - 6G70ME-C9	4.1	C
924	SAGA IMO 9528031	115,738	2011	249 m	Doosan - 7S60MC-C MK7	4.2	C
925	ZOUZOU N. IMO 9410222	149,991	2010	274 m	HHI - 6S70MC-C7	4.2	C
926	STI GOAL IMO 9717125	109,999	2016	250 m	CSSC - 6S60ME-C8	4.2	C
927	STI PARK IMO 9690793	109,999	2014	256 m	HHI - 6G60ME-C9.2	4.2	C
928	CIELO ROSSO IMO 9778301	74,999	2018	228 m	Hyundai - 6G70ME-C9	4.2	C
929	CAPTAIN A. STELLATOS IMO 9439670	105,848	2006	244 m	HHI - 6S60MC-C	4.2	C
930	A LEOPARD IMO 9838589	114,066	2021	250 m	6G60ME-C9-HPSCR	4.2	C
931	GULF CORAL IMO 9389851	74,999	2009	228 m	MAN - 6S60MC-C	4.2	C
932	SYROS WARRIOR IMO 9370850	107,687	2009	244 m	Mitsui - MITSUI MAN B&W 6S60MC-C	4.2	C
933	STI KINGSWAY IMO 9712852	109,999	2015	250 m	MAN - 6G60ME-C9	4.2	C
934	BNEIDER IMO 9595010	110,587	2012	250 m	MAN - 6S60ME-C8	4.2	C
935	MINERVA ELLIE IMO 9297321	103,195	2005	244 m	MAN - 7S60MC	4.2	C
936	TYRRHENIAN SEA IMO 9829100	114,218	2017	250 m	MAN - 6G60ME-9.5 (Tier III)	4.2	C
937	ALTAI IMO 9446427	115,952	2006	249 m	Doosan - 6S60MC-C	4.2	C
938	HAFNIA YANGTZE IMO 9393096	76,578	2009	229 m	DALIAN MARINE - 6S60MC	4.2	C
939	LEYTE SPIRIT IMO 9484089	109,670	2011	243 m	Hudong Heavy Machinery - 7 S 60 MC	4.2	C
940	APSOGOS IMO 9282053	115,444	2004	250 m	HSD Engine Co. Ltd. 7S60MC-C	4.2	C
941	ALYARMOUK IMO 9356438	116,038	2008	249 m	MAN - 6S60MC-C	4.2	C
942	DUGI OTOK IMO 9334727	108,414	2008	246 m	MAN - 6S60MC-C	4.2	C
943	ARCTICA IMO 9305556	117,099	2005	250 m	Hyundai - 7S60MCE-C	4.2	C
944	HAFNIA PRECISION IMO 9760213	74,997	2016	220 m	Hyundai - 6S60ME-C8	4.2	C
945	BLUE PRINCE IMO 9429182	109,010	2009	243 m	MAN - 7S60MC	4.2	C
946	P. MONTEREY IMO 9568172	105,525	2011	244 m	HHI - 6S60MC-C8	4.2	C
947	LIWA-V IMO 9489039	105,221	2011	244 m	MAN - 6S60MC-C8	4.2	C
948	SEA JEWEL IMO 9607722	112,081	2013	250 m	HHI - 7S60MC-C8.1	4.2	C
949	ADVANTAGE PADOVA IMO 9794848	74,000	2019	228 m	MAN - 6S60ME-C8	4.2	C
950	NEW VISION IMO 9804459	157,617	2018	276 m	Doosan - 6G70ME-C9	4.2	C

Page 19 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.