Two stinky auto fluid stories from my past come to mind.
1st
When I was a toddler my father (for some reason) decided to buy half of a pig from a local slaughter house. With that you also got parts that normally would have been thrown out or used elsewhere... such as two gallons of rendered lard. Dad put my sisters in the back of the station wagon with the carcass and lard telling them not to let it tip over. They started playing and messing with each other so when dad rounded a street corner the open topped gallon containers of lard tipped over spilling their entire contents into the back of the wagon, down into the spare tire storage, and filling every nook and cranny of the car's back half. After the beatings ended my father went through several gallons of varsol degreasing and deodorizing the family car. For the rest of the time we had that car I remember it had the little Christmas Tree deodorizers dangling from the rear view mirror.
2nd
When I was a teen and thought I knew better than my car's service manuals I was replacing my Toyota's clutch. The books said to drain the tranny first before removal. What did they know. Certainly I could skip that unnecessary step and therefore NOT have to put fresh gear oil in the box when I was done. On my back, under the car, I pulled the driveshaft out of the back of the gearbox and a torrent of 90W oil poured out before I could roll out of the way. The oil soaked every inch of my head. I had shoulder length curly hair at the time and it held at least a cup or more of gear oil better than a sponge. Moments later a friend of mine arrived at the house and couldn't stop laughing when they saw me slide out from under the car. Once the laughter stopped I asked them to go inside and get my mom's big box of Tide laundry detergent. I washed my hair 3 times with Tide and a garden hose and my head still smelled bad for about a week.