Pressure-volume-temperature (PVT) properties were measured with a high-pressure densitometer for the oligomeric solutions of acetophenone + poly( ethylene glycol)-200 (PEG-200) and acetophenone + poly( ethylene glycol methyl ether)-350 (PEGME-350) at temperatures from 298.15 K to 348.15 K and pressures up to 50 MPa. While the excess volumes are positive in acetophenone + PEG-200 over the entire composition range, those are found to change from positive to negative with increasing the mole fraction of the solvent in acetophenone + PEGME-350. The pressure effect on the liquid densities can be represented accurately by the Tait equation. Moreover, an empirical equation with two characteristic parameters correlates well the PVT data over the entire experimental conditions for each binary system. The experimental specific volumes were also correlated with the Flory-Orwoll-Vrij (FOV) and the Schotte equations of state to within the experimental uncertainty.