[sammybuns]

trying to get oil and grease stains off garage floor been there for awhile

 

[1910NE]

have you tried brake cleaner yet?

 

[bob22]

Stores sell concrete cleaner that I assume is meant to help with these types of stains; might try one of them. Brake cleaner would likely evaporate too quickly to get it all and the fumes aren't the best for health IMO.