[fielderLS3]

To possibly expand on this discussion a bit, maybe we could take this in a bit of a different direction.

What we basically disagree on most from a technical point of view is that with two engines that have the same power output, there won't be much if any difference efficiency wise from a NA engine and a "smaller" displacement turbo engine.

However, many here think a smaller turbo engine can make the same power as a N/A engine while using less fuel. Perhaps it could add more to the discussion if you explained scientifically why you think that is the case. Maybe I'll see the light and learn something, and maybe I'll rebut you. (And don't cite EPA ratings, because those are not an explanation of why).