Review of the options:
- Very slow speed increase.
– Wrong, while increasing speed the fuel consumption is high, as it requires power to increase speed.
- Skipping gears.
– Correct, in keeping with increasing speed quickly, which is helped by not running up through all the gears.
- Driving in as low a gear as possible.
– Wrong, low gears make the car more powerful, which requires more fuel. Less fuel is consumed by the high gears. (Low gears refers to a low number, fifth = high, first = low.)
- Maintaining an engine speed of at least 3,000 rpm.
– Wrong, the revs per minutes are to be kept under 3,000 rpm. Over 3,000 rpm can overload the catalytic converter.
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