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)

#699 of 1,789 oil tankers

CO₂ intensity

3.6 g CO₂/dwt·nm

vs segment average (5.1)

-30% 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
652	SFL THELON IMO 9593000	159,500	2010	274 m	MAN - 6S70MC	3.5	B
651	CAPTAIN JOHN IMO 9692832	113,876	2014	252 m	HHI - 6G60ME-C9.2	3.5	B
654	DELTA BLUE IMO 9601235	158,322	2012	274 m	HHI - 6S70MC-C8	3.5	B
656	FRONT CASTOR IMO 9780251	111,088	2017	252 m	CSSC - 6G60ME-C9	3.5	B
653	SFL TAURUS IMO 9978339	109,895	2024	250 m	6G60ME-C10-HPSCR	3.5	B
655	TP SPIRIT IMO 9645413	114,139	2016	252 m	Hyundai - 6X62	3.5	B
658	FRONT ALTAIR IMO 9745902	109,894	2016	252 m	CSSC - 6G60ME-C9.2 (Tier II)	3.5	B
657	BRIGHTWAY IMO 9588146	160,095	2012	274 m	MAN - 6S70MC-C8	3.5	B
659	SPETSES LADY IMO 9831074	109,992	2020	237 m	Hitachi - 6G60ME-C9	3.5	B
662	MINERVA GEORGIA IMO 9332157	163,417	2008	274 m	MAN - 6S70MC-C	3.5	B
661	SEAODYSSEY IMO 9740419	113,176	2017	250 m	CSSC - 6G60ME-C9	3.5	B
660	NAVIG8 WOLF IMO 9935301	109,999	2023	250 m	MAN - 6G60ME-C9	3.5	B
663	NORDDOLPHIN IMO 9779977	113,955	2017	250 m	Doosan - 6G60ME-C9	3.5	B
666	YANNIS P. IMO 9411343	158,149	2010	274 m	Hyundai - 6S70MC-C	3.5	B
665	RONG LIN WAN IMO 9783423	109,783	2017	250 m	CSSC - 6G60ME-C9	3.5	B
667	EAGLE LYON IMO 9795115	113,808	2017	250 m	Hyundai - 6X62	3.5	B
664	LEO SUN IMO 9457608	114,531	2011	244 m	Mitsui - 6S60MC-C	3.5	B
672	TORM HERDIS IMO 9797981	115,109	2018	250 m	CSSC - 6G60ME-C9	3.5	B
671	MIKELA P. IMO 9440382	158,007	2009	274 m	Hyundai - 6S70MC-C	3.5	B
670	LYRIC MAGNOLIA IMO 9734408	109,999	2016	250 m	MAN - 6G60ME-C9	3.5	B
669	MARE SICULUM IMO 9457892	158,466	2011	274 m	MAN - 6S70MC-C	3.5	B
668	GREEN AURA IMO 9808168	112,684	2019	250 m	Hyundai - 6G60ME-C9	3.5	B
673	AITOLOS IMO 9867619	115,521	2020	250 m	STX - 6G60ME-C9	3.5	B
674	BARBAROSA IMO 9415399	164,746	2009	274 m	Hyundai - 6S70MC-C	3.5	B
677	LUNARIA IMO 9901063	111,075	2019	250 m	6G60ME-C10-HPSCR	3.5	B
676	WHITE MOON IMO 9588158	160,152	2012	274 m	MAN - 6S70MC-C8	3.5	B
675	VIOLANDO IMO 9429285	164,764	2009	274 m	MAN - 6S70MC-C	3.5	B
678	MINERVA BALTICA IMO 9728241	113,172	2018	250 m	Hyundai - 6G60ME-C9	3.5	B
681	PROTEUS BOHEMIA IMO 9923437	109,999	2020	250 m	Wärtsilä - 6X62DF	3.5	B
680	FRONT FAVOUR IMO 9903968	109,893	2021	250 m	Wärtsilä - 6X62	3.5	B
679	FRONT FUSION IMO 9887803	109,899	2021	250 m	Wärtsilä - 6X62	3.5	B
682	IONIC ARIADNE IMO 9856555	112,007	2020	237 m	MAN - 6G60ME-C9	3.5	B
683	SELIGER IMO 9402263	115,126	2009	244 m	Mitsui - 6S60MC-C	3.5	B
685	GREEN ADMIRE IMO 9927196	114,377	2022	250 m	6G60ME-C9-HPSCR	3.5	B
684	FRONT BRAGE IMO 9418614	156,557	2011	274 m	MAN - 6S70MC-C	3.5	B
686	SPYROS K IMO 9565948	157,647	2009	274 m	HHI - 6S70MC-C7	3.5	B
689	NAVIG8 PERSEVERANCE IMO 9853266	109,997	2019	250 m	CSSC - 6G60ME-C9	3.6	B
688	HAFNIA GALATEA IMO 9796975	109,990	2019	250 m	MAN - 6G60ME-C9	3.6	B
687	YUAN TANG WAN IMO 9846005	113,683	2020	250 m	MAN - 6G60ME-C9	3.6	B
691	AMAX AVENUE IMO 9419450	115,789	2010	249 m	MAN - 6S60MC-C	3.6	B
694	NAVE COSMOS IMO 9971707	115,650	2022	250 m	MAN-B&W 6G60ME-C10	3.6	B
693	ELIAS TSAKOS IMO 9724075	113,736	2016	250 m	Hyundai - 6G60ME-C9	3.6	B
692	NORDPENGUIN IMO 9783007	112,038	2018	237 m	Mitsui - 6G60ME-C9	3.6	B
690	SEAFAITH IMO 9843209	111,964	2020	237 m	Hitachi - 6G60ME-C9	3.6	B
698	ARDAS I IMO 9930624	115,335	2023	250 m	MAN - 6G60ME-C9	3.6	B
697	MINERVA ELEFTHERIA IMO 9787168	114,696	2018	250 m	Mitsui - 6G60ME-C9	3.6	B
696	SOHO SQUARE IMO 9505819	114,900	2012	249 m	Doosan - 6S50MC-C	3.6	B
695	PACIFIC CORAL IMO 9893113	113,306	2022	250 m	Wärtsilä - 6X62DF	3.6	B
700	HYDRA IMO 9294551	105,744	2004	240 m	Sulzer - 6RTA58T	3.6	B
699	SEASPRITE IMO 9711468	113,998	2015	250 m	MAN - 6G60ME-C9	3.6	B

Page 14 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.