Gasoline options for Outback XT 2025

[sailkris]

should I use premium 91 octane or regular 87

 

[bmart]

What does the manual say? Probably on the filler door too.

 

[Dick Foster]

If you have a turbo charger, or any forced induction engine, you need to run premium grade, higher octane fuel to prevent pre ignition aka knock. Otherwise it's regular, lower octane fuel. Higher octane fuel is actually harder to burn and that's how it delays the onset of ignition and therfore suppresses knock.

 

[bmart]

Any mods may alter this too.