Should you keep using prestone yellow antifreeze or should you keep using green antifreeze?

You should choose antifreeze based on your vehicle's specifications and the manufacturer's recommendations. Prestone yellow antifreeze is an extended-life coolant suitable for modern vehicles, while green antifreeze is often traditional and may be used in older cars. Mixing different types can lead to decreased performance and potential engine damage, so it's best to stick with one type that matches your system. Always consult your owner's manual for the best option for your vehicle.