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Group II base oil margins rise on lower feedstock costs

  • Spanish Market: Oil products
  • 06/07/26

The US Group II base oil premiums continued to rise to declining feedstocks and competing fuel prices for the week ended 3 July.

US Group II base oil spot prices themselves were steady because market participants continue to gauge market uncertainty stemming from peace negotiations between the US and Iran.

Some US buyers are easing up on larger base oil purchases because of lower crude values. Others are continuing to build up inventory levels to maximize profit on the finished lubricant side and to prepare for the US Atlantic hurricane season.

Domestic sellers are uninterested in lowering prices while Group II availability remains lean and demand is holding relatively firm.

The Argus US domestic Group II N100 premium to four-week average low-sulphur vacuum gasoil (VGO) rose to its highest at $3.99/USG, up from its previous record of $3.86/USG. Margins from the same time frame in 2025 were $1.27/USG, a $2.72/USG discount from current levels.

Four-week average low-sulphur VGO prices declined because selling interest was low fluid catalytic cracker (FCC) margins fell. FCC margins are measured by a 70:30 split between conventional gasoline and ultra-low sulphur diesel (ULSD). Base oil premiums to diesel typically incentivize refiners to direct more VGO feedstock towards base oil production since both products utilize the same feedstock.

The Argus US domestic Group II N100 premium to four-week average US Gulf coast diesel increased to its record high at $3.15/USG, up from its previous high of $3.04/USG. Year-earlier margins were 93¢/USG, a $2.22/USG discount from current levels.

The four-week average low-sulphur VGO to four-week average WTI crude spread widened to $23.02/bl, up from $22.62/bl the week before. Four-week average low-sulphur VGO fell by 13¢/USG compared with four-week average WTI crude's 11¢/USG drop.


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