Quote:
Originally Posted by brucey
Vegasdude: I know it's odd, but my scangauge consistently shows best MPG at 45~50 mph. On a manual it might be different though.
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Not quite.
It's also a very efficient speed in many manual european cars I've driven.
It's at the sweet spot where the engine can rev fairly low but efficiently without a long (top) gearing strangling it and where aerodynamic drag isn't such an MPG-killer yet.
In my own car I get the best mileage between 42-47 mph in 4th gear.
In 3th gear at the same rpm it'll get similar mpg, but it's not getting anywhere fast then.
In 5th (top) gear at the same rpm I'll still get good mileage, but not the number I see in 4th due to increased aero drag at the higher speed - and any incline will make the mpg drop like a stone .
Driving my sister's Skoda Fabia 1.4L TDi again, I was getting a solid 2.2 L/100km @ 70 kph .... or over 105 mpg at 43.5 mph
Sweet
