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)

#1,208 of 1,789 oil tankers

CO₂ intensity

5.3 g CO₂/dwt·nm

vs segment average (5.1)

+3% higher

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
1201	CELSIUS PHILADELPHIA IMO 9884825	50,302	2021	183 m	MAN - 6G50ME-C9	5.2	D
1202	DUBAI DIAMOND IMO 9314181	73,672	2007	228 m	MAN - 6S60MC-CMKVII	5.2	D
1203	ASAHI PRINCESS IMO 9411197	105,372	2009	229 m	Mitsui - 6RTA58T	5.2	D
1204	KRITI SAMARIA IMO 9329409	105,865	2007	241 m	Hitachi - 6S60MC	5.2	D
1205	KRITI VIGOR IMO 9290397	159,156	2004	274 m	Hyundai - HYUNDAI-MAN B&W 6S70ME-C	5.2	D
1206	ENERGY AFRODITE IMO 9942304	49,812	2022	183 m	STX - 6G50ME-C9	5.2	D
1207	HAFNIA CATERINA IMO 9688427	49,999	2015	183 m	MAN - 6G50ME-B9	5.2	D
1208	ALDER EXPRESS IMO 9934163	49,832	2020	183 m	6G50ME-C9-HPSCR	5.3	D
1209	GRACE FERRUM IMO 9667928	49,995	2013	183 m	STX - 6S50ME-C	5.3	D
1210	MINDORO IMO 9389095	106,850	2009	244 m	Hudong Heavy Machinery - 6 S 60 MC-C	5.3	D
1211	CAPOEIRA IMO 9327011	73,400	2008	229 m	Hyundai - 5 S 60 MC-C	5.3	D
1212	PELICAN MARINER IMO 9905423	50,177	2020	183 m	MAN - 6G50ME-C9	5.3	D
1213	AL SOOR II IMO 9329784	69,836	2007	228 m	Doosan - 5S60MC-C	5.3	D
1214	JAG PRIYANKA IMO 9658379	50,026	2013	183 m	HHI - 6S50ME-B9.2	5.3	D
1215	CHRYSTAL SKY IMO 9334569	73,956	2008	228 m	Mitsui - 6S60MC-C	5.3	D
1216	CLEAROCEAN MUSTANG IMO 9893761	49,999	2020	183 m	—	5.3	D
1217	GIANNIS IMO 9432050	149,999	2011	274 m	Hyundai - 6S70MC-C	5.3	D
1218	TORM NEW ZEALAND IMO 9443152	49,999	2011	183 m	MAN - 6S50MC-C	5.3	D
1219	HELLAS CALAFIA IMO 9798088	49,810	2018	183 m	Hyundai - 6G50ME-B9	5.3	D
1220	ISE PRINCESS IMO 9411185	105,361	2009	229 m	Mitsui - 6RTA58T	5.3	D
1221	VICTORIA GLORY IMO 9952969	49,856	2023	183 m	MAN - 6G50ME-C9	5.3	D
1222	AURORA SPIRIT IMO 9837169	129,632	2020	277 m	Wärtsilä - 9L34DF	5.3	D
1223	TURQUOISE IMO 9717761	49,990	2015	183 m	Hyundai - 6S50MC-C8	5.3	D
1224	SOLAR CLAIRE IMO 9882425	49,990	2020	183 m	Hyundai - 6G50ME-C9	5.3	D
1225	HELLAS MARGARITA IMO 9794721	49,879	2017	183 m	Hyundai - 6G50ME-B9	5.3	D
1226	CHAMPION CONCEPT IMO 9272204	47,171	2005	182 m	ULJANIK - 6S50MC-C	5.3	D
1227	SEAVOYAGER IMO 9408762	109,085	2009	243 m	Hudong Heavy Machinery - 7 S 60 MC	5.3	D
1228	STI MAGNETIC IMO 9829485	47,499	2019	183 m	Hyundai - 6G50ME-C9	5.3	D
1229	PRATINCOLE PACIFIC IMO 9887621	49,941	2020	183 m	STX - 6G50ME-C9	5.3	D
1230	SEA TIGER I IMO 9358955	49,999	2007	183 m	STX - 6 S 50 MC-C	5.3	D
1231	LIGURIAN SEA IMO 9577032	116,715	2011	250 m	MAN - 6S70MC	5.3	D
1232	ALBERTA IMO 9486922	104,760	2010	229 m	Diesel United - 6S60MC-C	5.3	D
1233	NORD VALKYRIE IMO 9893773	49,999	2019	183 m	MAN - 6G50ME-C9	5.3	D
1234	ESTEEM DISCOVERY IMO 9882358	49,999	2018	183 m	MAN - 6G50ME-C9	5.3	D
1235	SPRING STREET IMO 9539585	50,007	2013	182 m	Mitsui - 6S50MC-C	5.3	D
1236	CL GEORGE ELIOT IMO 9943360	49,355	2023	183 m	MAN - 6G50ME-C9	5.3	D
1237	TORM LOTTE IMO 9392468	52,996	2009	183 m	Wärtsilä - 7RT-flex50	5.3	D
1238	VALLESINA IMO 9417311	109,089	2009	243 m	Hudong Heavy Machinery - 7 S 60 MC	5.3	D
1239	TORM SUBLIME IMO 9854789	49,974	2019	183 m	Hudong Heavy Machinery - 6G50ME-C9.5 Tier II	5.3	D
1240	CABO SAN VICENTE IMO 9346433	63,605	2008	228 m	MAN - 6S60MC-C	5.4	D
1241	ATHINA IMO 9884253	49,999	2020	183 m	MAN - 6G50ME-C9	5.4	D
1242	SAMOS IMO 9486934	104,649	2010	229 m	Mitsui - 6S60MC-C	5.4	D
1243	BW EGRET IMO 9607174	49,999	2014	175 m	MAN - 6S50MC-C8	5.4	D
1244	FREE SPIRIT IMO 9409259	113,091	2008	250 m	HHI - 7S60MC-C7	5.4	D
1245	HAFNIA PACIFIC IMO 9810226	49,686	2017	183 m	DALIAN MARINE - 6S50ME-B9	5.4	D
1246	TIDE SPIRIT IMO 9843912	129,632	2020	277 m	Wärtsilä - 2 x 12V34DF, 2 x 9L34DF	5.4	D
1247	PLOUTOS IMO 9327023	73,711	2006	229 m	Hudong Heavy Machinery - 5S60MC-C	5.4	D
1248	CHRYSALIS IMO 9437684	115,867	2010	249 m	MAN - 6S60MC-C	5.4	D
1249	MERONAS IMO 9934905	49,990	2022	183 m	Hyundai - 6G50ME-C9	5.4	D
1250	STI BOSPHORUS IMO 9785691	49,990	2017	183 m	Hyundai - 6S50ME-B9	5.4	D

Page 25 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.