They made a book based on that horrible movie??

“I like eating grilled cheese and playing with monster trucks”

I’ve used three-week-old fuel and I was fine, but I’m not sure about pushing it past that. If you’re a car too, you could possibly drink it to get your money’s worth. If you’d rather be safe than sorry and don’t want to risk causing harm to your engine, though, I’d just take the loss and dispose of it.