Premium vs Regular MPG: A 34-Tank Test

[mroadyblake]

It creates a new controversy however. How come the 2025 can run on diesel but the 2024 can’t? Are they tuned differently?

Will fill up with diesel on the way home tonight and report back.

 

[D-mac]

Will fill up with diesel on the way home tonight and report back.

See if it makes a difference if you use renewable R99 diesel or B20 biodiesel for science.

 

[DeepDive]

I'm a pretty simple beast. These ain't cheap trucks. Manual says premium. I'm using premium.