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 |
|---|---|---|---|---|---|
| 1301 |
ESTEEM ENERGY
IMO 9882346
|
49,999 | 2020 |
5.6
|
D |
| 1302 |
LYSIAS
IMO 9397511
|
49,999 | 2008 |
5.6
|
D |
| 1303 |
HIGH TRANSPORTER
IMO 9812743
|
51,504 | 2017 |
5.6
|
D |
| 1304 |
BODIL KNUTSEN
IMO 9472529
|
157,644 | 2011 |
5.6
|
D |
| 1305 |
JAG PUSHPA
IMO 9315733
|
47,848 | 2007 |
5.6
|
D |
| 1306 |
HELLAS REVENGER
IMO 9722637
|
49,975 | 2016 |
5.6
|
D |
| 1307 |
SHEGARDIAH
IMO 9856701
|
48,578 | 2020 |
5.7
|
D |
| 1308 |
STI MYTHIC
IMO 9833553
|
47,499 | 2017 |
5.7
|
D |
| 1309 |
HAFNIA LISE
IMO 9726621
|
49,875 | 2016 |
5.7
|
D |
| 1310 |
SERENGETI
IMO 9403554
|
74,999 | 2009 |
5.7
|
D |
| 1311 |
OVERSEAS SUN COAST
IMO 9862944
|
50,332 | 2019 |
5.7
|
D |
| 1312 |
STI REGINA
IMO 9686728
|
49,990 | 2014 |
5.7
|
D |
| 1313 |
PM IMPERIAL
IMO 9324306
|
76,574 | 2007 |
5.7
|
D |
| 1314 |
YAS
IMO 9439785
|
50,251 | 2009 |
5.7
|
D |
| 1315 |
BW WREN
IMO 9713856
|
49,999 | 2016 |
5.7
|
D |
| 1316 |
MINERVA OCEANIA
IMO 9380075
|
47,402 | 2009 |
5.7
|
D |
| 1317 |
HAFNIA ANE
IMO 9709776
|
49,999 | 2015 |
5.7
|
D |
| 1318 |
EAGLE BALDER
IMO 9833113
|
128,427 | 2020 |
5.7
|
D |
| 1319 |
TORM ADVENTURER
IMO 9326914
|
45,966 | 2007 |
5.7
|
D |
| 1320 |
ST.PETRI
IMO 9788497
|
50,105 | 2019 |
5.7
|
D |
| 1321 |
SUNNY VICTORY
IMO 9288760
|
46,803 | 2005 |
5.7
|
D |
| 1322 |
ENERGY CENTAUR
IMO 9387281
|
74,995 | 2008 |
5.7
|
D |
| 1323 |
LIMERICK SPIRIT
IMO 9312860
|
105,583 | 2007 |
5.7
|
D |
| 1324 |
SILVER ZOE
IMO 9692325
|
49,635 | 2015 |
5.7
|
D |
| 1325 |
CANAL STREET
IMO 9539561
|
49,993 | 2012 |
5.7
|
D |
| 1326 |
CHALLENGE PROCYON
IMO 9527403
|
45,996 | 2011 |
5.7
|
D |
| 1327 |
FRONTIER MARINER
IMO 9902847
|
50,275 | 2021 |
5.7
|
D |
| 1328 |
LARGO EAGLE
IMO 9935911
|
49,999 | 2022 |
5.7
|
D |
| 1329 |
CMC ANTILLANCA
IMO 9681120
|
49,990 | 2014 |
5.7
|
D |
| 1330 |
SV WAKILI
IMO 9590711
|
51,441 | 2012 |
5.8
|
D |
| 1331 |
NAVE ATROPOS
IMO 9638563
|
74,694 | 2013 |
5.8
|
D |
| 1332 |
JASMINE KNUTSEN
IMO 9273557
|
148,706 | 2005 |
5.8
|
D |
| 1333 |
VALLE AZZURRA
IMO 9391488
|
50,633 | 2007 |
5.8
|
D |
| 1334 |
SERENO
IMO 9437658
|
74,834 | 2009 |
5.8
|
D |
| 1335 |
STI BLACK HAWK
IMO 9704453
|
49,990 | 2015 |
5.8
|
D |
| 1336 |
LUCTOR
IMO 9479840
|
50,383 | 2011 |
5.8
|
D |
| 1337 |
KMARIN RENOWN
IMO 9683013
|
109,693 | 2016 |
5.8
|
D |
| 1338 |
ORFEAS
IMO 9358917
|
73,730 | 2008 |
5.8
|
D |
| 1339 |
SEA NAVIGATOR
IMO 9724594
|
45,999 | 2016 |
5.8
|
D |
| 1340 |
TORM LEADER
IMO 9343194
|
46,070 | 2009 |
5.8
|
D |
| 1341 |
VALPIAVE
IMO 9453030
|
115,909 | 2010 |
5.8
|
D |
| 1342 |
FAIR SKIES
IMO 9284386
|
74,032 | 2007 |
5.8
|
D |
| 1343 |
MARTINI
IMO 9319545
|
69,431 | 2006 |
5.8
|
D |
| 1344 |
PACIFIC QUARTZ
IMO 9573696
|
47,941 | 2011 |
5.8
|
D |
| 1345 |
CRUDE CENTURION
IMO 9436020
|
112,863 | 2010 |
5.8
|
D |
| 1346 |
TORM TITAN
IMO 9712319
|
49,757 | 2016 |
5.8
|
D |
| 1347 |
MINERVA PACIFICA
IMO 9325831
|
45,822 | 2006 |
5.8
|
D |
| 1348 |
JAG POOJA
IMO 9310692
|
48,539 | 2005 |
5.8
|
D |
| 1349 |
GEMINI PEARL
IMO 9365362
|
50,561 | 2007 |
5.8
|
D |
| 1350 |
AUTAN
IMO 9396763
|
50,667 | 2009 |
5.8
|
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.