Pour And Restore Vs Zep Driveway and Concrete Cleaner with power washer on cleaning oil stains

The management company where I live gigged me on Dec 12th about oil stains on my driveway, and expect me to have it cleaned by Dec 19th. ??? So, off to Lowe's I went. I purchases a Greenworks electric pressure washer combo, Zep Driveway and Concrete Cleaner, and some Pour and Restore oil stain cleaner. I spent about 2 hours by close of video, but I put another 2 hours in continuing to clean the rest of the driveway after the video. While the Zep cleaner, brush, and pressure washer took a lot more elbow grease / labor, it proved to be much better of a clean job than just using Pour and Restore cleaner... Especially, since it was a cool day. The Pour and Restore probably works better on a warm to hot, dry, day, when it will dry faster. But, Pour and Restore won't work well on a steep incline. The incline will not let it pool over stained area. I'm sure it would word better on a flat surface, allowing the liquid to stay ponded over applied area.