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Originally Posted by 91z4me
As would I. I think the 5.3 VVT will match up about as well as the 5.7 Hemi. I would assume each company will have the computers programed to work in their own manner, IE BMW engines tuned for more performance, GM trucks and Rams for more torque, RWD cars (LXs & Zegmas) for economy/performance.
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From what I've heard (surprsingly), the two-mode hybrid in the full-sized trucks will use the 6.0L rather than the 5.3L. I guess time will tell, but maybe the 6.0L will be able to spend even more time in 4-cylinder mode than the 5.3L will at cruise, and with the full-hybrid capabilities on the low end shutting off the engine more, the difference in fuel consumption between the 5.3L and 6.0L maybe be largely negated.