system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5 How does the start/stop feature in newer cars save fuel and not just wear out the starter?
gpt
The simple answer is that the starter motors are specifically designed for that purpose. Engineers design them with different bearings, brushes and gear ratios so that they are better suited to the task.

Starting a warm engine is also less strain on a starter than a cold engine.