Quote:
Originally Posted by dremd
The only "real world" load to fuel consumption data I have is that my mpg's stay virtually the same @55mph when climbing a slight hill. Maybe an indication that I can put more load on it at the lower rpm and not increase fuel usage?
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If engine speed stays the same and load goes up with no change in mileage then engine efficiency must have gone up. If there's a steep enough downhill grade it may be worthwhile, depending on fuel trim during acceleration, to give it a little gas/pop into neutral/rinse and repeat since there still is some difference between load and efficiency on a TDI, it's just not as large as on most gassers.