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.
| # | Vessel | Size (DWT) | Built | Carbon intensity — AER (g CO₂/dwt·nm) | Grade |
|---|---|---|---|---|---|
| 1051 |
SUNNY APATITE
IMO 9721891
|
49,999 | 2016 |
4.6
|
C |
| 1052 |
DIYYINAH - I
IMO 9487251
|
74,954 | 2011 |
4.6
|
C |
| 1053 |
NEXT
IMO 9286023
|
72,515 | 2004 |
4.6
|
C |
| 1054 |
ARK
IMO 9313486
|
105,804 | 2008 |
4.6
|
C |
| 1055 |
TORM HELLERUP
IMO 9798002
|
114,951 | 2018 |
4.6
|
C |
| 1056 |
MINERVA LISA
IMO 9276597
|
103,755 | 2004 |
4.6
|
C |
| 1057 |
NORD MIRAI
IMO 9890939
|
49,995 | 2021 |
4.6
|
C |
| 1058 |
ADVANTAGE SUN
IMO 9513141
|
156,644 | 2012 |
4.6
|
C |
| 1059 |
ADVANTAGE SUMMER
IMO 9419890
|
156,527 | 2010 |
4.6
|
C |
| 1060 |
TORM INTEGRITY
IMO 9602710
|
73,811 | 2010 |
4.6
|
C |
| 1061 |
TORM EMMA
IMO 9592680
|
75,022 | 2012 |
4.6
|
C |
| 1062 |
NISSOS KOUFONISSI
IMO 9895214
|
157,447 | 2021 |
4.6
|
C |
| 1063 |
AFRAMAX RIVIERA
IMO 9282912
|
107,113 | 2005 |
4.6
|
C |
| 1064 |
KMARIN RIGOUR
IMO 9683049
|
109,475 | 2016 |
4.6
|
C |
| 1065 |
PGC MARINA
IMO 9299563
|
72,807 | 2005 |
4.6
|
C |
| 1066 |
STAVANGER POSEIDON
IMO 9839105
|
49,999 | 2020 |
4.6
|
C |
| 1067 |
SOLAR MADELEIN
IMO 9882413
|
49,990 | 2020 |
4.6
|
C |
| 1068 |
MINERVA PISCES
IMO 9410179
|
105,475 | 2008 |
4.6
|
C |
| 1069 |
EMERALD SPIRIT
IMO 9422005
|
109,144 | 2009 |
4.7
|
C |
| 1070 |
TORM TIMOTHY
IMO 9726487
|
49,757 | 2013 |
4.7
|
C |
| 1071 |
LILLESAND
IMO 9336397
|
105,786 | 2007 |
4.7
|
C |
| 1072 |
SUEZ ICE SUPREME
IMO 9296418
|
146,356 | 2007 |
4.7
|
C |
| 1073 |
ECLIPSE I
IMO 9301536
|
158,933 | 2006 |
4.7
|
C |
| 1074 |
HAFNIA NANJING
IMO 9863235
|
74,999 | 2021 |
4.7
|
C |
| 1075 |
TORM EMILIE
IMO 9592692
|
75,013 | 2013 |
4.7
|
C |
| 1076 |
TORM SUPREME
IMO 9797735
|
49,999 | 2017 |
4.7
|
C |
| 1077 |
NORDTOKYO
IMO 9859208
|
50,192 | 2020 |
4.7
|
D |
| 1078 |
ZENOVIA LADY
IMO 9389277
|
109,999 | 2009 |
4.7
|
D |
| 1079 |
NAVIG8 MONTIEL
IMO 9482861
|
75,571 | 2012 |
4.7
|
D |
| 1080 |
OLYMPIC SKY
IMO 9489297
|
104,768 | 2008 |
4.7
|
D |
| 1081 |
SEASENATOR
IMO 9304368
|
105,715 | 2003 |
4.7
|
D |
| 1082 |
AFRAPEARL II
IMO 9437672
|
115,897 | 2010 |
4.7
|
D |
| 1083 |
NORVIC MONIA
IMO 9404936
|
105,348 | 2008 |
4.7
|
D |
| 1084 |
MARE NOSTRUM
IMO 9346885
|
110,295 | 2009 |
4.7
|
D |
| 1085 |
RAINBOW SPIRIT
IMO 9837171
|
129,734 | 2020 |
4.7
|
D |
| 1086 |
TWERK
IMO 9379961
|
74,268 | 2008 |
4.7
|
D |
| 1087 |
AEGEAN HARMONY
IMO 9338917
|
115,824 | 2007 |
4.7
|
D |
| 1088 |
BAYOU SUN
IMO 9911537
|
49,999 | 2022 |
4.7
|
D |
| 1089 |
PS STARS
IMO 9930519
|
49,999 | 2022 |
4.8
|
D |
| 1090 |
JAG LAXMI
IMO 9568196
|
105,525 | 2012 |
4.8
|
D |
| 1091 |
CHEMTRANS POLARIS
IMO 9308998
|
72,291 | 2005 |
4.8
|
D |
| 1092 |
ST.NIKOLAI
IMO 9788485
|
50,129 | 2018 |
4.8
|
D |
| 1093 |
MINERVA CLARA
IMO 9297333
|
103,231 | 2002 |
4.8
|
D |
| 1094 |
MERBABU
IMO 9388364
|
105,746 | 2008 |
4.8
|
D |
| 1095 |
ALTERA WIND
IMO 9863560
|
103,118 | 2021 |
4.8
|
D |
| 1096 |
YELLOW STARS
IMO 9913626
|
49,999 | 2021 |
4.8
|
D |
| 1097 |
SAKURA PRINCESS
IMO 9358541
|
105,365 | 2007 |
4.8
|
D |
| 1098 |
TORM EVA
IMO 9577109
|
74,213 | 2011 |
4.8
|
D |
| 1099 |
TP ENDURANCE
IMO 9895197
|
49,999 | 2020 |
4.8
|
D |
| 1100 |
NOUNOU
IMO 9960980
|
115,322 | 2023 |
4.8
|
D |
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.
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.