Ecuadoreans suing U.S. oil giant Chevron Corp for environmental damages...appealed a recent court ruling that awarded them $8.6 billion, claiming that more money would be needed for cleanup efforts...The long legal battle in Ecuador, which has spawned related actions in U.S. courts and international arbitration, is seen as a test case widely watched by international oil companies wary of precedents for other major damage claims...Calling the charges false, Chevron says it will seek to overturn Monday's ruling by Sucumbios court judge Nicolas Zambrano that found the company responsible for pollution. Resolution could still be years away, and few analysts expect the company to pay anything soon, if at all.