Drinking gasoline causes throat swelling, vision loss, blood stools, burning of food pipe, blood vomiting, heart and blood collapse, low blood pressure, skin burns, irritations, dizziness, drowsiness, weakness, burning of respiratory track, etc.
Drinking gasoline can cause you to go permanently blind. And just for reference, it doesn't take much swallowed gasoline to kill you just half an ounce can cause severe intoxication for adults and even death for small children. A 12 ounce drink of gasoline will be fatal to most humans