I've heard and read that scissor jacks should not be used to change tires on cars because they're dangerous.Yet besides at a shop I've only seen people use scissor jacks and I've changed tires with scissor jacks...I'm looking to buy a jack and wondering what's a good affordable one for the car.Picture of a Scissor Jack for those who don't know: (\ /) (. .) c('')('') ☆♠$☆.'ve heard and read that scissor jacks should not be used to change tires on cars because they're dangerous.