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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)
#425 of 1,789 oil tankers
CO₂ intensity
3.0 g CO₂/dwt·nm
vs segment average (5.1)
-41% greener
B
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
400 MARLIN SHIKOKU
IMO 9841627
156,573 2019
3.0
B
402 FRONT SEOUL
IMO 9831854
157,270 2019
3.0
B
405 FRONT SIENA
IMO 9832250
149,999 2019
3.0
B
404 DELTA MARINER
IMO 9579573
157,638 2013
3.0
B
403 SEARUNNER
IMO 9765029
114,129 2017
3.0
B
409 ELANDRA SWIFT
IMO 9945306
109,999 2024
3.0
B
408 FAIRWAY
IMO 9590319
160,250 2013
3.0
B
410 MIAOULIS 21
IMO 9886641
158,081 2021
3.0
B
407 ODESSA
IMO 9633458
162,090 2011
3.0
B
406 PROTEUS INGRID
IMO 9923463
119,900 2023
3.0
B
412 SAQR
IMO 9956018
113,385 2021
3.0
B
411 KAPODISTRIAS 21
IMO 9886639
158,081 2021
3.0
B
413 MONTESPERANZA
IMO 9585871
159,179 2012
3.0
B
416 CAPTAIN LYRISTIS
IMO 9877183
158,081 2021
3.0
B
415 EAGLE SAN JOSE
IMO 9795139
157,512 2018
3.0
B
414 MONTE ULIA
IMO 9803285
156,424 2019
3.0
B
417 TRINITY
IMO 9730361
158,734 2016
3.0
B
419 CAPE BENAT
IMO 9406013
156,642 2010
3.0
B
424 AL FALAH
IMO 9828388
114,708 2021
3.0
B
421 ESTEEM COWBOY
IMO 9952074
114,712 2024
3.0
B
420 SEAWAYS SAN SABA
IMO 9593426
159,018 2012
3.0
B
423 ALMI SUN
IMO 9579535
157,787 2013
3.0
B
422 MATALA
IMO 9776743
158,714 2017
3.0
B
418 SEA SHELL
IMO 9773947
158,409 2015
3.0
B
426 IXORA
IMO 9940459
111,006 2022
3.0
B
425 FRONT IDUN
IMO 9600944
157,000 2015
3.0
B
429 MARE PICENUM
IMO 9449405
158,489 2011
3.0
B
428 SEAENVOY
IMO 9740421
113,300 2017
3.0
B
427 MINERVA CORALIA
IMO 9728239
113,850 2017
3.0
B
430 EVRIDIKI
IMO 9318137
167,295 2007
3.0
B
433 GOLDWAY
IMO 9742900
154,781 2016
3.0
B
435 BARCELONA SPIRIT
IMO 9578634
158,482 2011
3.0
B
432 TENACITY VENTURE
IMO 9773052
114,439 2017
3.0
B
431 TARIF
IMO 9828390
114,799 2021
3.0
B
434 ALFA FINLANDIA
IMO 9823041
109,089 2019
3.0
B
436 PLATA EAST
IMO 9410997
297,007 2010
3.0
B
438 BURRI
IMO 9787948
115,018 2015
3.0
B
437 DILONG SPIRIT
IMO 9390628
159,021 2009
3.0
B
442 ORPHEAS
IMO 9318149
167,282 2007
3.1
B
441 STAR ENERGY
IMO 9773935
158,409 2016
3.1
B
440 PETALIDI
IMO 9529475
158,531 2012
3.1
B
439 MINERVA DOXA
IMO 9304617
159,438 2007
3.1
B
444 NORDIC ZENITH
IMO 9588469
158,645 2011
3.1
B
443 FAITHFUL WARRIOR
IMO 9750062
149,992 2016
3.1
B
446 SEAVIGOUR
IMO 9774185
158,566 2016
3.1
B
445 AL AGAILA
IMO 9415404
164,787 2009
3.1
B
447 DECATHLON
IMO 9462926
158,475 2012
3.1
B
450 ON PRECIOUS
IMO 9893216
114,623 2021
3.1
B
449 NORTH LOYALTY
IMO 9537771
314,000 2012
3.1
B
448 AIGEORGIS
IMO 9891660
116,092 2021
3.1
B
Page 9 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.