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US base oil output slips 5pc in March

  • Market: Oil products
  • 05/06/25

Domestic base oil and lubricant production in March fell by 5.3pc from year-earlier levels because refiners were hesitant to build up inventories while US tariff uncertainty kept demand muted.

Domestic producers typically build up base oil volumes in the spring to supply higher demand tied to increased driving activity in the summer months. US president Donald Trump's tariff announcements and subsequent delays incentivized refiners to postpone building up stockpiles.

US base oil production fell to 156,450 b/d in March from 165,290 b/d a year-earlier, according to the Energy Information Administration (EIA). March production rose by 11pc from 140,710 b/d in February. US crude production reached a record 13.5mn b/d in March.

Firmer base oil margins kept vacuum gasoil (VGO) feedstocks directed towards base oil output rather than competing fuels production. Higher base oil margins prevented base oil producers from curbing their output further, despite thinner buying interest.

Paraffinic base oil production in March decreased by 6.7pc to 130,940 b/d from 140,350 b/d a year-earlier. March output rose by 7.4pc compared to February production of 121,930 b/d.

Paraffinic output varied in US regions because of ongoing and upcoming planned maintenance. US Atlantic coast production declined from the prior month by 14pc while a key Group I refiner was on turnaround. A key Group II refiner in the US Gulf coast also took a turnaround in mid-March, but nearby regional suppliers offset some of the loss, holding total production levels flat. Production fell 3pc in the LA Gulf coast region because a key Group II supplier was running at reduced rates. Base oil output rose by 3pc in the Texas Gulf coast region and by 15pc in the US midcontinent region.

Naphthenic production was 25,520 b/d in March, a 2.3pc increase from year-earlier levels and a 36pc rise from February levels.

Firm demand for light- and heavy-grade naphthenics kept production rates elevated alongside higher crude values. Demand for naphthenic grades was led by the transformer oil and tire/rubber sectors.

US base oil output by regionb/d
Mar 2025Feb 2025m-o-m± %
US Gulf coast101,480101,4600
Texas Gulf coast48,74047,1803
Louisiana Gulf coast47,26048,680-3
US Midcontinent6,1605,36015
US Atlantic coast5,1005,890-14

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