ASE Auto Maintenance and Light Repair Certification (G1) Practice Test

Low tire pressure does indeed negatively impact fuel efficiency, primarily because it increases rolling resistance. When tires are under-inflated, they tend to flatten out more on the road surface, which creates a greater contact area and leads to increased friction. This extra resistance requires the engine to work harder, which in turn uses more fuel.

Maintaining the correct tire pressure is essential for optimal performance and efficiency, as properly inflated tires roll more easily, reducing the workload on the engine. The significance of this relationship highlights the importance of regular tire maintenance as a way to enhance fuel economy while also promoting tire longevity and overall vehicle safety.