By Tim Jimenez

PHILADELPHIA (CBS) — The push for fuel-efficiency means automakers are trying to make lighter cars.

That also means repairs possibly costing more and auto shops trying to change with the times.

Automakers have to get drivers farther on less fuel and keep them safe.

Shops like AOK auto-body in South Philadelphia deal with that too says manager Steve Kulis.

“We need more information to repair a vehicle now because of the different metals that are used and the different welding techniques. The different composites like carbon fiber and aluminum,” Kulis says.

The Aluminum Transportation Group estimates car-makers using 550 pounds of aluminum per car by 2025, a 200 pound jump from 2009.

With more parts needing replacement rather than repairing, Kulis says they have to keep investing.

“You need more equipment; different drill bits. You need a different welder,” Kulis says.

Last year, the federal government set the goal of 54.5 miles per gallon for 2025 models.

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