SINGAPORE, July 10 (Reuters) - Iran has raised its official selling prices (OSPs) for August-loading crude to Asia for most of its grades, tracking increases announced by top exporter Saudi Arabia last week. Prices for Iranian Light, Iranian Heavy and Forozan Blend have been raised, the source said. September-loading trade in the Middle East crude market is yet to start, participants said. Uncertainty surrounding exports from OPEC member Iran is supporting the market, while concerns over slowing demand from the world's second-biggest oil consumer, China, are weighing on sentiment. Iraq's State Oil Marketing Organisation (SOMO) raised its August official selling prices (OSP) for its two export grades Basrah Light and Kirkuk to the United States, Asia and Europe. Brent crude fell below $99 a barrel on Tuesday on concerns about demand growth after Chinese crude imports weakened in June, while worries over supply disruptions eased as a labour strike in Norway's oil industry ended. * TRADES - Trafigura sold three Dubai partials to Mercuria for September at $96.40 a barrel. * MARKET NEWS - Tough Western sanctions are forcing Iran to take drastic action and shut off wells at its vast oilfields, sinking production to levels last seen over two decades ago and costing Tehran billions in lost revenues. - China's crude imports plunged in June to their lowest daily rate since December, coming off a record high in May, customs data showed, as refiners cut imports amid slowing oil demand in the world's second-largest oil consumer and crude buyer. - Norway's government ordered on Monday a last-minute settlement in a dispute between striking oil workers and employers in a move to alleviate market fears over a full closure of its oil industry and a steep cut in Europe's supplies. - China will cut gasoline retail price ceilings by 420 yuan ($65.9) a tonne and diesel by 400 yuan from Wednesday, energy consultancy C1 Energy reported on Tuesday. - Japan's weather bureau said on Tuesday its climate models indicate there is a strong possibility the El Nino weather pattern, which is often linked to heavy rainfall and droughts, will emerge this summer. CRUDE Price Prev Change SEP DME Oman diff to Dubai swaps 1.05 0.93 0.12 AUG Brent 98.57 99.02 -0.45 SEP Dubai 95.55 95.89 -0.34 SEP DME Oman 96.60 96.82 -0.22 AUG Brent/Dubai EFS 2.78 2.90 -0.12 PRODUCT CRACKS AUG fuel oil crack -4.00 -4.02 0.02 AUG gasoil crack 17.56 17.37 0.19 AUG naphtha crack -9.01 -8.46 -0.55 COMPLEX REFINERY MARGINS Today 7.47 Last 5 days 6.50 Last 365 days 7.31 (Reporting by Manash Goswami; Editing by Clarence Fernandez)

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