re: Removing oil stains from driveway - UPDATED in OP

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I've read that Acetone works well; anyone know if it will damage the concrete itself?

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I don't see where it could damage the concrete. Acetone probably works as good as lacquer thinner, but it evaporates much quicker. That wouldn't be a problem in this cooler weather, but would flash off very quickly in the summer heat.

Brake cleaner would work well also but more expensive. It's basically axylene, toluene, and benzene mixture.

Gas might leave a stain itself.