[Grench]

I used to have a nasty commute. 125 miles per day with 75 minutes on the road. For that I drove a '91 Ford Escort. Since I was changing the oil every 3-4 weeks on it, I had it down to a pretty good science. Ramps, drain, change filter, fill, drive it off the ramps and out the garage the next morning.

So, one morning after an oil change I jumped in the car, fired it up, backed out of the garage and there was a monster spill all over the floor. I was wearing a suit.

Inside, call work that I would be a half hour late, change, pull the filter and... Two O rings. Fix it, fill with oil, shower, suit up. I had to leave the mess on the floor to clean up 10 hours later.

Now... how I was taught is the best way to get oil out of concrete (at least that I know of).
HiDry - pile on liberally to the spill. Wait 15 minutes. Sweep. Big blackish stain remains.
HiDry - just a thin layer. Then use an old paving brick (the solid kind with no holes) and get on your hands and knees and grind the HiDry into the concrete using the brick. Sweep. Stain gone.

Double garbage bag the used HiDry.

IMHO YMMV