-Based on American petroleum institute heavy oil iscategorized to have 10 and 20-degreegravity and a viscosity of thousands of centi-poises that flow under solution gas driveas the mean driving mechanism. thatensues in pressure decline experiments by way of investigationin many laboratory tests worldwide. It is alsobelieved to be avital recovery mechanism in some heavy oil reservoirs in the world, which have revealed more performance in recovery factors when it was compared to Darcy flow behaviour, however Darcy deals with single flow behaviour. Many scholars had investigated heavy oil properties for the past decades, and attempted to explain them. This article shows one of the most significant properties for heavy oil flow which is the compressibility. foamy oil or heavy oil has different properties, such as low production gas oil ratio, high oil viscosity, high daily production rate and high primary recovery factor. The compressibility of the foam turns out to be one of the predominant factor that directs the foamy oil phenomenon. To enumerate the focalaspects affecting the compressibility of the heavy oil, dead oil compressibility for both refined mineral oil and crude oil were measured using the densitometer Paar DMA 45, and then the compressibility of the live oil was measured using the same set-up with the same technique as for the dead oil. Foamy oil is more compressible than conventional solution gas because of the tiny gas bubbles that are diffused in the oil; thus, the oil formation volume factor is much higher than the conventional oil. The experimental results show that at different saturation pressures and room temperature, the trends fit the expected behaviour above the saturation pressures. In addition, the measurements of the live oil compressibility were also attempted below the saturation pressures. It was concluded that the oil viscosity is more dominant factor than compressibility compared to the presence or absence of asphaltenes and other highly polar oil components.