I store a boat at a friends house and this drives me insane. He has a big tub of what used to be transmission fluid he drained from his truck. Unfortunately he never disposed of it so it's just sitting by his house and every time it rains it over fills onto the ground and what's left in the tub becomes more and more diluted with rainwater. Can I dump this at advance auto parts with the oil? Or is there a better option that just killing the aquifer?
That's what I would do. The water will separate easily. Under normal circumstances it's not nice to mix oil and water but I think this case warrants it and is the better choice than leaving it as is.
I have the same issue with motor oil. I just dump it all, oil and water, at the nearest FLAPS. They haven't said a word to me otherwise......
i believe it goes through a seperating process as one of its very first steps anyways, so I think it should be fine too.
at this point, just letting it get more and more diluted with rainwater seems like the easiest solution..
Oil doesn't get diluted by water. Water is heavier, so it goes to the bottom. Oil floats on top. If water gets high enough, oil spills over the edge. Could this be the "dilution" you're seeing?
Have you ever considered smacking him upside the head and telling him to grow the hell up?
Dump it at the auto parts place. Their counter jockeys don't care.
Combust the fluid off the top and be left with water and leaves
Well I emptied 35 quarts worth and there was still plenty left. You're right, most of it was water which had separated from the ATF/Oil. I actually think it's oil and not ATF. Smelled like balls and looked like a chunky milkshake. I'm going to dump the 35 quarts at advance and then refill. It's out of the rain for now.
The oil doesn't get diluted, but the tub does. 
Letting it sit forever let's the oil run out as the water level rises. It all gets dumped on the ground, whether you do it quickly or bit by bit.
Is this no longer relevant?
Apis Mellifera wrote: Is this no longer relevant?
my grandpa used his drain oil to "pave" his redrock driveway.
Too bad it's diluted (or more accurately "floated away"), I was going to stay stand way back and toss in a match 
You'll need to log in to post.
