You may find that your Insight's unique combination of an engine and an electric motor has driving characteristics that are somewhat different from what you are used to. Shift Up and Shift Down indicators on the instrument panel show when to shift to a higher or lower gear. By shifting as soon as the indicator comes on, you will keep the engine operating in its most economical range. Depending on traffic conditions, try to maintain a constant speed. Every time you slow down and speed up, your car uses extra fuel.
Wind resistance causes vehicles to use more fuel at higher speeds.
Driving at moderate speeds on the highway reduces wind resistance and conserves fuel. A cold engine uses more fuel than a warm engine. You can drive away in about a minute, no matter how cold it is outside. The engine will warm up faster, and you get better fuel economy. The air conditioning puts an extra load on the engine which makes it use more fuel.