LONDON, Aug 27 (Reuters) -North Sea Oseberg and U.S. WTI crude differentials eased on Tuesday although levels remained elevated due to tight physical supply.

PLATTS WINDOW

* Indications are on a free-on-board (FOB) basis unless marked as cost, insurance and freight (CIF) or delivered at place (DAP).

* Oseberg: Total bought from Equinor Sept. 19-21 at dated Brent plus $3.45, down slightly from the last assessment which was the highest since early August 2023 according to LSEG data.

* WTI Midland: BP bid Sept. 27-Oct. 1 CIF Rotterdam at dated Brent plus $2.25 and Aramco offered Sept. 24-28 at dated Brent plus $3.05. The midpoint of dated plus $2.65 was down from a deal on Friday at dated Brent plus $2.90.

* The midpoint equated to around dated plus $1.74 on a FOB basis, according to Reuters calculations.

* Ekofisk: Equinor offered Sept. 22-24 at dated Brent plus $3.55, above the last assessment, and withdrew the offer.

* WTI remained the cheapest grade underpinning the dated Brent benchmark on Tuesday.

Reporting by Alex Lawler, Editing by Tomasz Janowski

 NORTH SEA CRUDE OIL DIFFERENTIALS AND OUTRIGHT PRICES: 0#BFO-DIF 0#C-E Dated BFO BFO- Brent BFO-BRT BFO-E Forties BFO-FOT FOT-E Oseberg BFO-OSE OSE-E Ekofisk BFO-EKO EKO-E Monthly North Sea crude loading programmes O/LOAD OPEC OPEC NSEA North Sea CRU crude oil PROD oil products DRV derivatives PRO/E European products OILOIL NYMOIL, IPEOIL, OILSPD, OILARB CRDWLDPRODEUR, PRODUS, APROD ENERGY energy speed guide CRUDE/1 crude speed guide