OSLO, June 5 (Reuters) - * Norwegian shares traded down on Tuesday * Oslo's benchmark index fell -0.30 pct, or -2.65 points, to 879.44 points and was up by 8.30 pct year-to-date * The broader Oslo All Share Index was down 0.5 percent * Brent crude futures, a trigger for the oil heavy Oslo Bourse, fell $-1.01 to $74.28 a barrel * Among the biggest firms on the Oslo Bourse, Equinor fell 1.26 pct, Telenor rose 0.65 pct and DNB rose 0.44 pct * Oil-related stocks PGS, Aker BP, DNO and TGS fell 1-5 pc