Just two weeks ago, the price differential for Mars sour crude plummeted to trade at discounts to NYMEX-CME Domestic Sweet (DSW) — the commonly quoted prompt month futures contract price of crude oil. Since then, Mars has bounced back, recovering $1.74 from these four-month lows. Mars is an important price marker for medium sour crude produced in the offshore Gulf and transported via the Mars pipeline to Clovelly, LA. It is often seen as a barometer to assess the supply availability of other imported sour crudes such as those from Canada, Mexico, and the Middle East.
While there are several factors that can influence Mars pricing, the latest round of price volatility comes alongside supply issues of competing medium and heavy sour grades from Canada and Venezuela. Mars began strengthening in October 2024 as discussed in our previous analyst insight, trading at premiums as high as +$3.37/bbl above DSW on March 4 (pink dashed circle in graph below).
