  Millimeter-wave (CO) observations of optically-selected QSOs are potentially
a powerful tool for studying the properties of both the QSOs and their host
galaxies. We summarize here a recent molecular gas survey of z<0.17 optical
QSOs with infrared (IR) excess, L_IR (8-1000 um) / L_bbb (0.1-1.0 um) > 0.36.
Eight of these QSOs have been detected to date in CO(1-0), and the derived
molecular gas masses are in the range 1.7-35x10^9 M_sun. The high L_IR / L'_CO
of QSOs relative to the bulk of the local (z<0.2) IR luminous galaxy merger
population is indicative of significant heating of dust (L_IR) by the QSO
nucleus and/or by massive stars created in the host galaxy with high efficiency
(i.e., per unit molecular gas, L'_CO).
