Paint thinner and mineral spirits both work well for cleaning oil-based paint, but there are subtle differences, including odor and cost. This brief run-down will help you decide what's best for you.
Mineral spirits is more highly refined and has fewer odors than paint thinner.
Paint thinner is mineral spirits in a less refined form.
Mineral spirits or paint thinner… which is better? For cleaning brushes, paint thinner is best since it's half the cost of mineral spirits and basically works the same. Other than the price, the differences between the two solvents are subtle:
No matter which solvent you choose, use it in a well-ventilated space and observe proper safety precautions.