How Does the 5.7 hemi drop to a 4 cylinder on highway?

The 5.7L Hemi engine does *not* drop to a 4-cylinder mode like some other engines with cylinder deactivation. It's a V8 engine; it either runs on all 8 cylinders or it's off. There's no system to seamlessly switch to using only 4 cylinders. Any perceived drop in power or fuel consumption at highway speeds would be due to factors like:

* Throttle position: Lighter throttle input at highway speeds naturally reduces engine load and therefore fuel consumption.

* Gear selection: The transmission shifting to a higher gear reduces engine RPM, leading to less fuel use.

* Vehicle speed: At higher and consistent speeds, the engine is less stressed.

* Aerodynamics: Highway driving tends to be more aerodynamically efficient than stop-and-go city driving.

If someone is claiming their 5.7 Hemi is dropping to 4 cylinders, they're mistaken about how the engine functions.