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 |
|---|---|---|---|---|---|
| 1 |
VL BRIGHT
IMO 9926740
|
319,202 | 2022 |
1.4
|
A |
| 2 |
MARAN DANAE
IMO 9930791
|
320,916 | 2023 |
1.4
|
A |
| 3 |
MARAN DIONE
IMO 9930806
|
320,916 | 2023 |
1.4
|
A |
| 4 |
MARIA A. ANGELICOUSSIS
IMO 9930789
|
320,916 | 2023 |
1.4
|
A |
| 5 |
YUAN YUE HU
IMO 9681211
|
307,865 | 2015 |
1.4
|
A |
| 6 |
ANTONIS I. ANGELICOUSSIS
IMO 9930777
|
320,916 | 2023 |
1.4
|
A |
| 7 |
SEAWAYS ENDEAVOR
IMO 9933573
|
299,365 | 2023 |
1.5
|
A |
| 9 |
ADVANTAGE VISION
IMO 9933559
|
299,455 | 2023 |
1.6
|
A |
| 8 |
FRONT EMPIRE
IMO 9788332
|
320,000 | 2018 |
1.6
|
A |
| 10 |
EAGLE VELLORE
IMO 9933602
|
299,554 | 2023 |
1.6
|
A |
| 11 |
SEAWAYS EXCELSIOR
IMO 9933597
|
299,468 | 2023 |
1.6
|
A |
| 14 |
SEAWAYS ENTERPRISE
IMO 9933585
|
299,365 | 2023 |
1.6
|
A |
| 12 |
YUAN RUI YANG
IMO 9843326
|
318,451 | 2022 |
1.6
|
A |
| 13 |
EAGLE VERACRUZ
IMO 9933626
|
299,525 | 2024 |
1.6
|
A |
| 15 |
NEW LAUREL
IMO 9603192
|
320,611 | 2014 |
1.6
|
A |
| 17 |
OLYMPUS
IMO 9941661
|
301,850 | 2023 |
1.6
|
A |
| 16 |
EAGLE VENTURA
IMO 9933614
|
299,407 | 2023 |
1.6
|
A |
| 18 |
ADVANTAGE VERDICT
IMO 9933535
|
299,451 | 2022 |
1.7
|
A |
| 19 |
ADVANTAGE VICTORY
IMO 9933547
|
299,468 | 2022 |
1.7
|
A |
| 20 |
ALTEREGO
IMO 9926697
|
299,847 | 2020 |
1.7
|
A |
| 21 |
FRONT BEAVER
IMO 9943748
|
300,008 | 2023 |
1.7
|
A |
| 22 |
ADVANTAGE VITAL
IMO 9933561
|
299,590 | 2023 |
1.7
|
A |
| 23 |
FRONT GANDER
IMO 9937098
|
300,018 | 2023 |
1.7
|
A |
| 24 |
AGIOS NIKOLAS
IMO 9845506
|
363,186 | 2019 |
1.7
|
A |
| 25 |
FRONT MORGAN
IMO 9877781
|
299,999 | 2021 |
1.7
|
A |
| 27 |
NEW VOYAGE
IMO 9686364
|
313,733 | 2015 |
1.7
|
A |
| 29 |
NEW ODYSSEY
IMO 9708497
|
318,167 | 2016 |
1.7
|
A |
| 26 |
IOANNA
IMO 9387566
|
318,325 | 2008 |
1.7
|
A |
| 28 |
AROSA
IMO 9784386
|
299,323 | 2017 |
1.7
|
A |
| 30 |
MARAN ARETE
IMO 9776547
|
319,398 | 2015 |
1.8
|
A |
| 31 |
HELLAS PALIROS
IMO 9928657
|
299,999 | 2022 |
1.8
|
A |
| 32 |
FRONT GAULA
IMO 9933652
|
299,982 | 2022 |
1.8
|
A |
| 33 |
UNIVERSAL WINNER
IMO 9837602
|
299,981 | 2019 |
1.8
|
A |
| 34 |
ESTEEM EXPLORER
IMO 9855484
|
312,135 | 2020 |
1.8
|
A |
| 37 |
ANTIGONE
IMO 9709075
|
299,421 | 2015 |
1.8
|
A |
| 36 |
RED NOVA
IMO 9602643
|
319,778 | 2013 |
1.8
|
A |
| 35 |
LEGIO X EQUESTRIS
IMO 9912256
|
299,937 | 2022 |
1.8
|
A |
| 38 |
GEM NO. 1
IMO 9735361
|
302,652 | 2016 |
1.8
|
A |
| 41 |
DHT LEOPARD
IMO 9733961
|
299,629 | 2016 |
1.8
|
A |
| 40 |
NISSOS RHENIA
IMO 9845685
|
318,744 | 2019 |
1.8
|
A |
| 39 |
ANDRONIKOS
IMO 9830812
|
320,784 | 2019 |
1.8
|
A |
| 42 |
EAGLE VALENCE
IMO 9910234
|
299,244 | 2022 |
1.8
|
A |
| 44 |
ASCONA
IMO 9828338
|
299,999 | 2019 |
1.8
|
A |
| 43 |
WATER TIGER
IMO 9858034
|
299,995 | 2020 |
1.8
|
A |
| 45 |
HUNTER
IMO 9896414
|
299,940 | 2021 |
1.8
|
A |
| 46 |
DHT PEONY
IMO 9385843
|
320,013 | 2011 |
1.8
|
A |
| 47 |
DHT LION
IMO 9722895
|
299,629 | 2016 |
1.8
|
A |
| 49 |
NEW WEALTH
IMO 9706384
|
318,455 | 2017 |
1.8
|
A |
| 48 |
NEW COMFORT
IMO 9706413
|
313,999 | 2016 |
1.8
|
A |
| 50 |
DHT PUMA
IMO 9728837
|
299,629 | 2014 |
1.9
|
A |
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.