Someone was reporting 50/50 water to gas? I don’t believe that...
“We had water in our fuel from the get-go, all day,” said Blaney crew chief Tommy Baldwin. “We put [the car] back in the garage and worked on it and didn’t know what was going on. We drained it - half water and half fuel.”
That’s from the article I linked above. As I said earlier, Dave on Wind Tunnel was quite emphatic about the water in Blaney’s fuel.