Contaminated and uncontaminated soil samples were analyzed for index properties (i.e. Atterberg limits, compaction, unconfined compression, and direct shear test) and classified according to the Unified Soil Classification System (USCS). Soil samples fall under CL class according to the (USCS), with fine fractions varying between 48% and 52%. The properties of both contaminated soil samples with different mass ratios of lubricating oil (3%, 5% and 10%) and uncontaminated samples were determined to study the effect of pollution by lubricating oil on some soil properties. Atterberg limits and strength parameters for the treated soil samples were determined after curing the samples at room temperature for seven days. Three samples were tested from each batch and the results are expressed as a mean value.