George Andrews Wrote:
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> Also worth considering, is that EMD's 567 / 645 /
> 710 series prime movers are 2 - stroke. While a 2
> - stroke engine produces power on every down -
> stroke, they also use more fuel than a 4 - stroke
> prime mover such as GE's FDL design.

Such performance data has ONLY been true in full controlled laboratory testing. In the real world of every-dy railroad, normal duty cycles, the GE 4-stroke has consistently been proven NOT to be more fuel efficient that an EMD turbocharged 567 or 645 or 710 (when compared to comprisable units).