Had a friend that worked for Jiffy Lube and the car they had just changed oil in leaked on the guys driveway. Unfortunately, it happened to be the VP of a large concrete company... Long story short, he was consummately impressed with the stain removal, he called to ask what the guy used... It was an grease & oil cleaner from Walmart mixed with gas. Poured it on, lit it, scrubbed it with a stiff bristled brush & hosed it down... End of story.
22.5 WSM w/ Guru, CB940, 26 MB Pro Kettle, MB 40" Electric, Maverick ET-7 & Taylor Digi