LONDON (AFP) - Oil prices fell on Tuesday as the dollar rose and investors turned their attention to upcoming inventory data, traders said. New Yorks main contract, light sweet crude for April delivery, dropped 1.05 dollars to 80.82 dollars a barrel. Brent North Sea crude for April delivery shed 1.14 dollars to 79.33 dollars. Crude oil prices fell (further) from an 8-week high towards 80 per barrel, as the US dollar continued to strengthen against the euro and put further pressure to the crude oil prices, said Sucden Financial Research analyst Myrto Sokou. A stronger US unit makes dollar-denominated oil more expensive for buyers holding other currencies, hitting demand for crude. The euro fell against the dollar in European deals on Tuesday as investors looked for fresh details on Greeces plans to resolve the nations debt crisis, analysts said. Oil prices had risen on Monday, at one point reaching the highest level since January 11, at 82.41 dollars. But it struggled to hold on to levels that had been supported by euphoria over better-than-expected US jobs data published last Friday. The United States is the worlds biggest energy consuming nation and on Wednesday its government publishes the latest weekly snapshot of US crude inventories. The US economy is on the road to recovery and we expect a gradual pick-up in the US energy demand ahead of the US summer driving season, said VTB Capital analyst Andrey Kryuchenkov. The driving season begins in May and lasts for a few months. It coincides with the US summer vacation period and signals a climb in demand for gasoline as Americans make long road trips. Elsewhere, the market was keeping a close watch over major oil exporter Iran. The largest oil trader in the world, Vitol, said Monday it had stopped dealing with Iran following a report that traders were pulling out of the country as sanctions and US pressure took their toll. The Financial Times said Vitol and its fellow trading giants Glencore and Trafigura had stopped supplying petrol to Iran. A spokesman for Vitol confirmed the report to AFP late on Monday. One unnamed executive familiar with Irans trade told the newspaper that Vitol had consciously decided not to participate in Irans tenders. Another industry executive told the paper Switzerland-based Trafigura stopped selling to Iran about three months ago because they have concluded that theres too much political and financial risk. Glencore distanced itself from Iran late last year. Although Iran is one of the worlds largest oil producers, it is forced to import petrol because its refineries are dilapidated and it suffers from intense demand because of generous subsidies.