Oil is insoluble in polar solvents like water, but are soluble in non-polar solvents such as benzene, toluene etc.
Polar solvents have a positive and a negative charge at different places in their structures and will dissolve other polar substances.
Non-polar solvents are compounds that have low dielectric constants and are insoluble in water.
Solvents are the substances that dissolves solutes.
Benzene is a chemical that is colorless and light yellow liquid at room temperature.
Toluene is "a clear, colorless liquid which becomes a vapour when exposed to air at room temperature".
Hence, toluene would work better to remove the oil.
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