12 Common Car Myths That Many Drivers Still Believe Not every piece of car advice passed from one driver to another is true. Some automotive myths have been repeated for decades, even though modern vehicles work very differently from the cars of the past. Believing these myths can cost you money, shorten your car's lifespan, or even create unnecessary maintenance. Let's separate fact from fiction. Myth 1: Premium Fuel Makes Every Car Perform Better The Myth Premium fuel gives