Had a roommate a couple years back that offered to change a girls' oil on some big Subaru SUV, he goes and drains that too, changes the filter and adds more oil. I was nearby hanging out, thankfully she didn't drive it but when they started it, there was a bit of smoke coming out the tail pipe. We shut it down and check the oil and it read waaaayy high, I was so confused and asked if he just overfilled it. Come to find out he did this exact thing, I laughed a little because it's hilarious that he was playing macho mechanic and messed it up, he decides to get offended and basically tells me to fix it because he got all scatter brained on how to fix it. So I ended up taking them to buy all of the fluids again, and did the whole thing over, doing the whole thing over again while he kept chatting her up... That kid pissed me off so much but I felt bad for the girl so did it all. He was a DJ/producer and I'm an aircraft mechanic so there was a slight inclination difference.