# Sparks, Carbon......100k!

**URL:** <https://community.cartalk.com/t/sparks-carbon-100k/198404>\
**Category:** Maintenance/Repairs\
**Created:** [December 16, 2024, 5:25pm UTC](https://community.cartalk.com/t/sparks-carbon-100k/198404 "2024-12-16T17:25:57Z")\
**Posts on this page:** 1\
**Showing post:** 17

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [December 17, 2024, 1:27pm UTC](https://community.cartalk.com/t/sparks-carbon-100k/198404/17 "2024-12-17T13:27:54Z")

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> [@Did an oil analysis on my Mazda](https://community.cartalk.com/t/did-an-oil-analysis-on-my-mazda/194307/1):
>
> noticed significant engine braking on a freeway so

Did you find out why your transmission is doing this? There should be little engine braking unless you manually downshift.

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