When will it end

FishOnOne wrote:


I agree and understand your point. I guess I was pointing out in previous tests there has been no real coorilation to compression ratio with these particular trucks since there are so many variables at play. And I do find this stuff interesting as well.

I didn't say there was a direct correlation. I just said it was interesting. I also pointed out some of the other factors that have effect on fuel efficiency in that very same post like turbo charger efficiency at certain rpms and fuel pressures. The Cummins higher compression ratio and how the turbocharger was designed for lower rpm efficiency plays a big part as to why it generally achieves the best fuel economy of the three even though it has the biggest displacement.