# Automotive “Start/Stop” Systems -?

**URL:** <https://boards.straightdope.com/t/automotive-start-stop-systems/1019820>\
**Category:** Factual Questions\
**Created:** [June 18, 2025, 10:33pm UTC](https://boards.straightdope.com/t/automotive-start-stop-systems/1019820 "2025-06-18T22:33:48Z")\
**Posts on this page:** 1\
**Showing post:** 40

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**Author:** ![Crafter\_Man](https://sea3.discourse-cdn.com/straightdope/user_avatar/boards.straightdope.com/crafter_man/32/458_2.png) [@Crafter\_Man](https://boards.straightdope.com/u/Crafter_Man)\
**Post date:** [June 19, 2025, 10:26pm UTC](https://boards.straightdope.com/t/automotive-start-stop-systems/1019820/40 "2025-06-19T22:26:57Z")

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> [@Saint\_Cad](#):
>
> We are all told that starting your car is the hardest time on your engine.

True. But only when the engine block is cold.

It has to do with the gasoline contaminating the oil. @Machine_Elf gives an excellent explanation [here](https://boards.straightdope.com/t/cold-start-vs-warm-start-for-cars/674556/7).

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