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Old 12-30-2007, 12:33 AM   #13 (permalink)
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Originally Posted by dremd View Post
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?

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.
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