When you pull up to an ordinary gas station, you’ll see multiple types of gasoline. The most common here in the U.S. are listed as “regular,” “plus,” and “premium.” To the casual observer, it might ...

Q: Can you address the difference, if any, between non-oxygenated versus other gas? One gas station I use has regular octane 87, premium octane 92 and non-oxygenated octane 91. They say their premium ...