Most drivers are confused about premium gas - and oil companies aren't exactly rushing to clear things up.

In this episode of Motormouth, we break down when premium fuel is absolutely necessary, when it's a complete waste of money, and how you can test it yourself in your own vehicle.

we explain:

1) What "recommended" vs "required" really means

2) why engine design matters more than marketing

3) How modern ECU's adjust for octane (and when they can't)

4) Why owner operators should follow the fuel door sticker and owner's manual

5) How to run your own real-world fuel economy test

Plus - we're officially announcing the 30-Day Fuel Season Challenge starting this February, where drivers track fuel type, mileage, and performance to see what actually works.

If you want your vehicle to last, perform ...