LONDON, Oct 18 (Reuters) -North Sea Ekofisk crude differentials rose on Friday after a deal, while U.S. WTI Midland and other North Sea grades were steady.

PLATTS WINDOW

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

* Ekofisk: Total bought from BP, CIF Rotterdam, Nov. 1-3, dated Brent plus 85 cents, up from the last assessment.

* WTI Midland: Phillips 66 offered a cargo with Nov. 9-13 dates at dated Brent plus $1.75 CIF Rotterdam, the same as an offer on Thursday.

* The offer equated to around dated plus 82 cents on a FOB basis, according to Reuters calculations.

* Forties: No indications on Friday and last valued at dated Brent minus 5 cents.

* Forties therefore remained the cheapest grade and set the dated Brent value.

Reporting by Alex Lawler; Editing by Louise Heavens

- 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