A better warning sign

Its an easy mistake to make but one I didn’t want to make. I put a unleaded petrol in a diesel engine. It’ll work for a bit I am told, but it has the potential to do alot of damage to an engine. Don’t do it. The fuel tank hole was bigger than usual, and the warning Diesel sticker was below the intake, I simply missed it. Fortunately I pull over as soon as I noticed something wasn’t right and recognised my mistake soon after that. I called a tow truck and $700 later I was back on the road… stupid. look for the signs.