# What did you do to your car today?

**URL:** https://forums.speedlife.net/t/what-did-you-do-to-your-car-today/239557
**Category:** Shift518 Automotive
**Created:** [October 16, 2008, 7:38am UTC](https://forums.speedlife.net/t/what-did-you-do-to-your-car-today/239557 "2008-10-16T07:38:24Z")
**Posts on this page:** 1
**Showing post:** 7990

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### Author: ![Leonidas](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/leonidas/32/6670_2.png) [@Leonidas](https://forums.speedlife.net/u/Leonidas)
#### Post date: [December 13, 2010, 1:15pm UTC](https://forums.speedlife.net/t/what-did-you-do-to-your-car-today/239557/7990 "2010-12-13T13:15:52Z")

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> [@Been pulled over? check here](https://forums.speedlife.net/t/been-pulled-over-check-here/38001/16):
>
> I have always been weary of doing that. Did you only use it in the gas, or did you do the let the vacuum line take some in, and put some in the oil?

When I did it last year I put 1/3 in the tank, 1/3 in the crankcase, and 1/3 through the brake booster hose. I then changed the oil about a week later.

It definitely made the motor idle smoother, and I gained 1.2mpg throughout my usual commute.

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