:flame: works or you could coat the dry spots with a nice even coat of oil so it all matches. Usually about the time, the rain washes away my oil stains, the leaks are back.
Or you could pour a little oil under all of the neighbors cars, so everybodies driveways, look uniform.
High pressure washer works (somewhat), but the stains come back. Small areas, kitty litter works about as good as anything else. Never have too much luck with chemical cleaners or soaps, just more polution for minimal results.