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Weather is warming up, so I decided it was time to do my yearly oil change. Took longer this year because I decided to remove the cleanout plate and replace that gasket. I spent a couple hour scraping the old gasket off the pan and the plate itself. It got late so I decided to finish up the next day. Before I went in I bolted the plate in place just tight enough to keep any critters out. Before I put the plate on, I did notice that there was still a slow drip of oil coming out, but I didn't think anything about it. I completely forgot to put the drain pan back underneath it. The next day I came out to find this.
Well, I guess now the oil has completely drained. Oh well. I've made worse mistakes.
So that's not fresh oil, then. It's better than losing new oil! A little kitty litter and you'll be good! Except if you don't like stains on your concrete.
Its amazing how so little oil can cover so much territory.
When I got my Packard straight 8 engine I spent some time, filled it with new oil, and fired it up on my test stand on the garage floor. Later when we were done running it I noticed a small drip. Nothing major, just a slight drip once in a while. I was cleaning up for the night so I slid a small drip pan under it (a small loaf pan that the wife discarded. When I made it out to the garage the next day that danged thing had filled up the loaf pan and covered the garage floor. I'm betting as soon as I turned my back and shut the lights off the thing went from a small drip to Old Faithful geyser......aagh.
If the stain in the concrete bugs you, pour some lacquer thinner over the whole stain and while still wet scrub the area with a scrub brush followed up with water / dawn dish soap (the blue stuff) and when dry the stain will either be completely gone or barely visible.
Used this method plenty of times with great success.