LONDON, Sept 5 (Reuters) -U.S. WTI Midland crude differentials were again stable on Thursday amid lacklustre selling interest in the Platts window, as Norwegian Johan Sverdrup traded at the same level as in the previous session.

PLATTS WINDOW

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

* WTI Midland: Trafigura offered two cargoes, one with Sep. 22-26 dates at dated Brent plus $2.60 CIF Rotterdam, and one with Sep. 17-21 dates at dated Brent plus $2.30 CIF Rotterdam.

* The lower of the offers, at dated plus $2.30 CIF Rotterdam, equated to around dated plus $1.41 on a FOB basis, Reuters calculations showed.

* On Wednesday, Chevron had offered a cargo with Sep. 28 - Oct. 2 dates at dated Brent plus $2.30 CIF Rotterdam, up from an offer at dated plus $2.15 earlier in the week.

* Johan Sverdrup: Equinor sold BP an Oct. 1-3 cargo at dated Brent flat FOB Mongstad.

* The deal occurred at the same level as a trade in the previous session, when Equinor sold an Oct. 3-5 cargo to BP.

* Sverdrup is not one of the grades in the dated Brent basket.

* WTI remained the cheapest grade underpinning the benchmark on Thursday.

Reporting by Robert Harvey; editing by David Evans

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