Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: i work as a technician, in and out of people's homes all day long, so i am constantly stopping at gas stations to use the restroom.  as i am getting back into my van, a nice old lady gets my attention from the pump next to mine and asks if i could help her fuel her car. she already has the gas cap off so i don't think anything of it.  she's from out of town, so i help her scan her city market rewards card to save however many cents off fuel, swipe her debit card, ask her which grade she would prefer, pick premium, and she begins fueling.  i drive away from the pumps and park in an adjacent lot, waiting for a job to show up on my phone. i see the lady pulling away, she waves and i wave back. 

i then notice as she is turning out of the lot that her volkswagen is a tdi (diesel). my heart sinks. i just helped a little old lady ruin her engine. or pump at least.  

if you are on reddit little old lady, i'm very sorry.

TIFU by helping an elderly woman put fuel in her car