This video has a bit more info for the Jeep application, and is saying the standard output will have the same octain requirement as the current 5.7, and is a $2,000usd upgrade from the Hemi.
https://www.youtube.com/watch?v=z7-dDV_lolM
The new Jeep options have worse mileage when towing compared to the existing, so it will be interesting to see how much loading it takes to loose the fuel economy advantage for the RAMs.
Both the 6.4 and H.O. in the Grand Wagoneer use premium, and I'm curious to see if we're nearing the point RAM will call for Premium to get better emissions and mileage numbers. I've worked with a few business expecting to get carbon tax credit if/when switching octaine lowers use/emissions.
5.7 Hemi Wagoneer | Hurricane S.O. | 6.4 Hemi Grand Wagoneer | Hurricane H.O. |
392HP | +7.1%HP | 471HP | +8.3% HP |
404TQ | +15.8% TQ | 455TQ | + 9.9% TQ |
15/20/17MPG | +11.8% MPG std. | 13/18/15MPG | + 6.7% MPG std. |
| -1.5% MPG towing | | -4.1% MPG towing |