No point in putting crap fuel in a vehicle if you expect it to perform well and last a long time.
Not true. Crap fuel will give you crap MPG, and could clog up fuel injectors. It won’t necessarily ruin your engine.
What ruins car engines is running on low coolant, making it run hotter and that burns up valves. Another thing which will ruin the car engine is using low quality oil and keeping it too long in the engine and letting the level drop below recommended.