What is the best octane gasoline for my vehicle? John Paul, AAA Northeast's Car Doctor, answers a question from a reader wondering whether they need to follow the manufacturer’s gasoline ...

You have a choice when you pull up to the pump. Most gas stations have three choices for fuel for your vehicle, based mostly on octane ratings. Which one is the best for your vehicle? A lot of that ...

We may receive a commission on purchases made from links. Most gas stations have three options that you can put in your vehicle: regular, mid-grade (plus), and premium. These labels are also often ...

DEAR CAR TALK: The owner's manual of my car – an Audi A6 – says to use 91-octane fuel. But the pump near me has 87, 89 or 94. Since then, I've noticed that a lot of cars require 91-octane. Is this a ...

What is octane rating? What is cetane number? Gas & diesel ratings. What is octane rating? What is cetane rating? When purchasing gasoline or diesel fuel you’ve likely noticed the selection of numbers ...