Fuelish

People who were "fuelish" would learn to conserve, or simply do without.

Source: wiktionary

Driving fuel-efficient vehicles and using motorbikes when possible to replace or supplement vehicles are two of the ways Department of Fish, Wildlife and Parks employees are attempting to become less fuelish and to lower transportation costs.

Source: wiktionary

For the moment, there is no energy crisis, no gasoline rationing, no collection of conservation tips from oil companies, no twinge of un-Americanism from driving a car big enough to fit into comfortably, and no such thing as being "fuelish."

Source: wiktionary

The fifty-five-mile-per-hour speed limit, the unreliable cars that had been reconfigured to meet fuel efficiency standards, the constant reminders not to be “fuelish” served as reminders that one of America's oldest freedoms—the freedom to waste—had been severely curtailed.

Source: wiktionary