How do you clean oil stains off garage floors?

Here's a link with a few ideas to try:

https://www.bakerdoorcompany.com/blog/how-to-effortlessly-remove-oil-grease-stains-from-a-garage-floor

How to Remove Oil Stains from Concrete

1. Wash away the oil with a strong detergent, and a scrub brush or sponge.
2. Use a concrete cleaner or degreaser to loosen and remove the oil.
3. Apply a poultice that will break down the oil and suck it from the concrete.
4. Let special single-celled microorganisms eat up the oil.

Check out one of my posts on removing oil stains from concrete: I did an (unpaid) review on 2 different products. This was not perfect but one of the products lessened the oil stain. It was a very old stain so maybe if you get it sooner than later it would do better:

https://karupp-did.net/power-washer/

Dry cement or cat litter.

Both need to be worked in with a wood block.

Sweep up after two days and re-apply if necessary.

sprinkle on cat litter to absorb. After a couple days sweep up and then use Dawn dish soap to help with any remaining stains

Start with oil dry to absorb all fluids. Then pressure wash with a degreasing solution.