What is an effective strategy for conserving fuel while driving?

Planning ahead and combining short trips into one slightly longer journey is an effective strategy for conserving fuel. This approach allows drivers to minimize the number of separate trips made, which can lead to reduced fuel consumption. Each time a vehicle is started from a cold state, it consumes more fuel until the engine reaches optimal operating temperature. By consolidating errands or trips into one, the car runs more efficiently and reduces the frequency of those cold starts.

Additionally, shorter trips can often involve more frequent stops and starts, which is less efficient for fuel use. By combining them, you not only save fuel but also reduce wear and tear on the vehicle and contribute to lower emissions.

The other options presented do not effectively support fuel conservation. Driving at high speeds typically increases fuel consumption due to higher air resistance and engine load. Avoiding public transportation completely disregards an alternative that can be more fuel-efficient, and using a car only for long-distance travel misses opportunities for efficiency in everyday commuting needs. Hence, planning ahead and combining trips optimally uses your vehicle's fuel efficiency.