If so, the 5.7L would be tuned for efficiency, while the 6.6L performance model could power the Corvette ...

The 6 N’s smooth, aerodynamic shape — with a low drag coefficient of .27 — is interrupted at the back by a swan-neck rear ...

Lou Trottier says the problem likely involves low-friction piston rings, which increase fuel efficiency but can also be problematic in older vehicles ...