Should I start my car everyday if I don't drive it?
Should I start my car everyday if I don't drive it? Keeping the battery from dying is everyone's first concern. Turning your engine on every week is about more than confirming it will still start. Running your engine by driving it will kick on the alternator, which allows the battery to recharge thus being able to turn on in the future.
Is it bad to let a car sit for 3 days?
If it is a newer car, this simply doesn't matter. If your car is less than 3 years old you can leave it alone as long as you want and the only thing you might have do deal with is a dead battery requiring a jump start. Of course, your car would be better off after the three years if it was driven periodically.