Why not ?
Why not ?
Some hills are too steep to leave the throttle in one position.
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View my fuel log 2014 Mirage DE 1.2 manual: 49.2 mpg (US) ... 20.9 km/L ... 4.8 L/100 km ... 59.1 mpg (Imp)
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View my fuel log 2013 Mirage 1.0 manual: 47.5 mpg (US) ... 20.2 km/L ... 5.0 L/100 km ... 57.0 mpg (Imp)
Exactly! SOME hills are too steep. Actually most hills are to steep.
But...some hills are very slight, and when there's no traffic anywhere near me I let the car speed up and slow down on it's own.
I do this by holding the gas pedal perfectly still. This takes concentration, not one of my strong points.
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View my fuel log 2013 Mirage 1.0 manual: 47.5 mpg (US) ... 20.2 km/L ... 5.0 L/100 km ... 57.0 mpg (Imp)
Yup.
If the hills aren't too steep and you're not obstructing traffic, fixed throttle position is better than cruise control.
Cruise control does the opposite of what you want for good fuel economy: it adds more fuel to climb, then wastes the potential energy gained in the climb by backing off the throttle on the descent, using engine braking to maintain speed.
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View my fuel log 2014 Mirage ES 1.2 manual: 62.4 mpg (US) ... 26.5 km/L ... 3.8 L/100 km ... 74.9 mpg (Imp)
Where I live the hills are not too bad and I like to hold my RPM at 2000 at all times during commute.
This gives me an effective speed range of 80km/hr to 105km/hr which is not too obstructive for other vehicles.
I often wondered if there was a way to set up cruise for set RPM rather than set speed as I have gone 74 mpg (Imp)
using this technique.
note: CVT
Will weld for beer.
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View my fuel log 2014 Mirage SE 1.2 automatic: 45.3 mpg (US) ... 19.3 km/L ... 5.2 L/100 km ... 54.5 mpg (Imp)
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View my fuel log 2013 Mirage 1.0 manual: 47.5 mpg (US) ... 20.2 km/L ... 5.0 L/100 km ... 57.0 mpg (Imp)
There's no simple answer to this question - it depends on many factors.
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View my fuel log 2014 Mirage ES 1.2 manual: 62.4 mpg (US) ... 26.5 km/L ... 3.8 L/100 km ... 74.9 mpg (Imp)