Oil Stains in Driveway - normal wear and tear or deposit?

[Amanda C.]

We had tenants renting for 4yrs, when we got to the property after they moved out we noticed a large oil-stain in the driveway as well as various other smaller oil stains in the driveway. This photo is before pressure washing, we are trying solvents to remove the stains. Would you charge damages from the security deposit? I understand a small drip or two would be normal wear and tear, but a stain this large seems excessive?