I had cars ,and trucks also before unleaded fuel became mandatory, and I'm still breathing. Imo, thats when fuel was fuel. You could pull up to the pumps, and demand Sunoco 260. Now a days, all the gasoline grades are unleadedmy pops had a '76 Ford eco van. leaded-fuel only, in the late '70s
THOSE leaded exhaust fumes were toxic in the winter when you could see and sniff 'em