The Brent-WTI spread has blown out to $13/bbl, its widest in years, as surging tanker freight costs pull the world's two dominant crude benchmarks apart, Benzinga reported.

The gap matters beyond the arbitrage desks. A $13 differential between North Sea Brent and West Texas Intermediate at Cushing reshapes the economics of every crude stream priced off the two markers — from US Gulf Coast exports to Atlantic-basin cargoes — because freight is now the wedge between what a barrel fetches in the US interior and what it fetches waterborne.

Why is freight doing this to the spread?

Brent prices waterborne cargoes that must cross oceans; WTI prices barrels delivered into a landlocked Oklahoma hub. When tanker rates spike, the delivered cost of seaborne crude rises relative to Cushing barrels, and the spread widens mechanically. Benzinga attributes the current $13 gap to exactly this dynamic: soaring tanker costs splitting the oil market rather than any single supply outage or demand shock.

For US producers and midstream operators, a wider spread is a double-edged instrument:

• It strengthens the pull on barrels toward export terminals on the Gulf Coast, where cargoes price against Brent.
• It lifts realized prices for US crude relative to domestic refiners' feedstock cost, refining the classic producer-refiner split.
• It raises the hurdle for economics that assume cheap freight to move Midcontinent surplus to water.

What does a $13 spread mean for trade flows?

Arbitrage economics dictate that a wide Brent-WTI spread should incentivize US exports until the gap compresses toward the cost of shipping. The market signal is straightforward: barrels that can reach tide water gain value against barrels that cannot. Watch the response at the major US crude export hubs, where volumes tend to track the spread with a lag as cargo programs re-price.

Benzinga's framing — that tanker costs are "splitting" the market — points to the driver sitting in the freight column of the ledger, not in production or refinery fundamentals. That distinction matters for readers tracking benchmark relationships: spreads driven by freight behave differently from spreads driven by storage or OPEC supply policy, and they can reverse quickly when shipping rates normalize.

What should readers watch next?

The watch items are the freight market itself and the export data. If tanker rates stay elevated, the spread holds width and the export pull strengthens; if rates soften, expect the $13 gap to compress as the shipping cost wedge narrows. Traders will also monitor Cushing inventory levels and US crude export loadings for confirmation that the widening spread is doing its usual work — moving barrels toward the higher-priced basin.

For hedgers and funds with exposure through instruments such as the United States Brent Oil Fund, the widened differential between the global and US benchmarks heightens basis risk on any position that assumes the two markers move in lockstep. The $13 level is the number to track.