A technique to build mm-wave arbitrary 2N band oscillators is presented. Based on even-odd mode operation, the technique breaks the fundamental tradeoff between frequency switching range and tank quality factor, Q, which exists in classical switched-capacitor and switched-inductor methods. As a result, this technique achieves multiband operation with FOMs comparable to single band oscillators. To verify the theory, a quadruple band oscillator with 4 arbitrary chosen frequencies (43, 49, 58 and 75 GHz) is implemented in 65-nm CMOS technology. The phase noise measurements taking at 1 MHz offset are -100.3, -95.3, -93.8 and -86.2 dBc/Hz, respectively. The power consumption of the oscillator core is 12mW. The presented technique would enable the development of mm-wave software-defined multistandard radios.