# Good syn transmission fluid?

**URL:** https://community.electricforum.com/t/good-syn-transmission-fluid/925
**Category:** EV Small Talk
**Created:** [August 23, 2008, 7:43am UTC](https://community.electricforum.com/t/good-syn-transmission-fluid/925 "2008-08-23T07:43:13Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![dtbaker](https://avatars.discourse-cdn.com/v4/letter/d/7bcc69/32.png) [@dtbaker](https://community.electricforum.com/u/dtbaker)
#### Post date: [August 23, 2008, 7:43am UTC](https://community.electricforum.com/t/good-syn-transmission-fluid/925/1 "2008-08-23T07:43:13Z")

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does anyone have info on various synthetic manual trans fluids… are there any non-partisan studies on efficiency? looking to maximize efficiency? I need to replace fluid anyway, and might as well use a good one.

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### Author: ![BridelessRacing](https://avatars.discourse-cdn.com/v4/letter/b/aca169/32.png) [@BridelessRacing](https://community.electricforum.com/u/BridelessRacing)
#### Post date: [August 23, 2008, 7:15pm UTC](https://community.electricforum.com/t/good-syn-transmission-fluid/925/2 "2008-08-23T19:15:32Z")

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In a manual trans Mobil1 gear oil with Justice Brothers Gear oil treatment.

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### Author: ![Bombardier](https://avatars.discourse-cdn.com/v4/letter/b/f07891/32.png) [@Bombardier](https://community.electricforum.com/u/Bombardier)
#### Post date: [October 10, 2008, 4:31pm UTC](https://community.electricforum.com/t/good-syn-transmission-fluid/925/3 "2008-10-10T16:31:43Z")

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Check out the Amsoil site.

They have an interesting read on oil comparisons with specs etc.