Forum Discussion
Buck50HD
Feb 18, 2015Explorer
In the last 5 months, I don't think I've driven my truck in any conditions where the cylinder deactivation would even come remotely close to activating. But, I don't haul groceries or commute with it. I also have not seen a direct comparison where there has been any significant difference in mileage between the 3. In fact, the 6.4 was consistently the worst in the PUT.com shootout. My 2004 2500HD 6 liter got the same mileage. There's a lot raving about the Ram mileage but I still have a hard time buying it.
I had a GM 5.3 with cyl deactivation and the only thing it did was cause stuck lifters on a cold start and sounded like it was coming apart. The mileage was no different than previous non-AFM 5.3's I owned. It was used to pass emission tests, not save fuel for the owner.
3/4-ton Shootout Fuel Economy
I had a GM 5.3 with cyl deactivation and the only thing it did was cause stuck lifters on a cold start and sounded like it was coming apart. The mileage was no different than previous non-AFM 5.3's I owned. It was used to pass emission tests, not save fuel for the owner.
3/4-ton Shootout Fuel Economy
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