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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)
#723 of 1,789 oil tankers
CO₂ intensity
3.6 g CO₂/dwt·nm
vs segment average (5.1)
-29% greener
C
1,826
vessels ranked
1.36
greenest (g CO₂/t·nm)
4.12
segment median
# Vessel Size (DWT) Built Carbon intensity — AER (g CO₂/dwt·nm) Grade
700 EAGLE BINTULU
IMO 9795074
113,400 2019
3.6
B
699 YPAPANTI
IMO 9693082
109,999 2016
3.6
B
704 SEASPRITE
IMO 9711468
113,998 2015
3.6
B
703 HYDRA
IMO 9294551
105,744 2004
3.6
B
702 ROSS SEA
IMO 9457593
114,542 2006
3.6
B
706 NORDIC VEGA
IMO 9412581
164,028 2010
3.6
B
708 FLAVIN
IMO 9787912
115,125 2018
3.6
B
707 FEZZAN
IMO 9888730
114,243 2021
3.6
B
711 SAFEEN ELIZABETH
IMO 9524449
158,573 2011
3.6
B
710 EAGLE KUANTAN
IMO 9417012
107,481 2010
3.6
B
709 STI ALEXIS
IMO 9696694
109,999 2015
3.6
B
714 MARATHI
IMO 9772357
158,000 2018
3.6
B
713 STI LOBELIA
IMO 9838228
109,994 2017
3.6
B
712 STI SANCTITY
IMO 9719707
109,999 2013
3.6
B
715 PROTEUS HARVONNE
IMO 9923401
109,999 2022
3.6
B
718 DELTA SPIRIT
IMO 9419096
161,724 2010
3.6
B
720 PACIFIC ANNA
IMO 9772010
109,999 2015
3.6
B
717 MELTEMI I
IMO 9298741
163,759 2006
3.6
B
722 NISSOS CHRISTIANA
IMO 9694658
114,264 2015
3.6
B
721 SARASOTA A
IMO 9383869
106,850 2008
3.6
B
716 BALLA
IMO 9749556
113,293 2017
3.6
B
719 ABDIAS NASCIMENTO
IMO 9453896
150,000 2017
3.6
B
724 PACIFIC NAFSIKA
IMO 9732278
109,999 2015
3.6
C
726 ARETEA
IMO 9711456
113,969 2015
3.6
C
723 PATROCLUS
IMO 9413834
158,267 2009
3.6
C
728 BREEZE III
IMO 9292515
115,525 2005
3.6
C
727 PIS RINJANI
IMO 9792864
115,000 2019
3.6
C
725 HAFNIA SHANGHAI
IMO 9830290
74,999 2019
3.6
C
729 JAG LAKSHYA
IMO 9516117
157,641 2011
3.6
C
731 TORM INNOVATION
IMO 9602722
73,847 2013
3.6
C
730 DREPANOS
IMO 9420643
107,467 2012
3.6
C
733 ON PHOENIX
IMO 9893228
114,623 2021
3.7
C
732 MINERVA VERA
IMO 9411941
158,022 2009
3.7
C
734 MINERVA ZENOBIA
IMO 9787182
114,671 2018
3.7
C
735 MARLIN HESTIA
IMO 9729233
74,260 2017
3.7
C
736 ATLANTIC EMERALD
IMO 9892975
109,201 2022
3.7
C
739 TORM GABRIELLA
IMO 9428994
119,456 2010
3.7
C
738 DELTA IOS
IMO 9406685
157,484 2009
3.7
C
737 BOCCADASSE
IMO 9829899
111,000 2018
3.7
C
741 SELETAR SPIRIT
IMO 9484077
108,993 2008
3.7
C
740 SEA PANTHER
IMO 9802164
114,723 2018
3.7
C
746 LIPARI
IMO 9529487
158,237 2012
3.7
C
745 FRONT ANTARES
IMO 9745926
111,059 2017
3.7
C
744 HOVDEN SPIRIT
IMO 9596997
105,276 2010
3.7
C
743 ANWAAR BENGHAZI
IMO 9888742
114,077 2021
3.7
C
742 HAFNIA LARVIK
IMO 9946465
109,999 2023
3.7
C
748 TIGANI
IMO 9776767
112,763 2017
3.7
C
747 STI RAMBLA
IMO 9730880
109,999 2017
3.7
C
750 HUMBLE WARRIOR
IMO 9856361
149,990 2020
3.7
C
749 SEARUBY
IMO 9759795
114,073 2017
3.7
C
Page 15 of 36 — 1,789 vessels
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.