Tiger A320 near Sydney on Jul 26th 2014, oil fumes in cabin

A Tiger Airways Airbus A320-200, registration VH-VNG performing flight TT-517 from Brisbane,QL to Melbourne,VI (Australia), was enroute at FL360 about 150nm northwest of Sydney,NS (Australia) when both crew donned their oxygen masks reporting they had constant suspected oil smell in the cabin, they were both on oxygen, and decided to divert to Sydney. The crew continued to use their oxygen masks until after vacating runway 34L about 30 minutes after reporting the fumes.

The airline confirmed an engineering issue. The passengers were rebooked onto other flights.