# 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:** 6779

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### Author: ![jdaniels](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jdaniels/32/6399_2.png) [@jdaniels](https://forums.speedlife.net/u/jdaniels)
#### Post date: [July 7, 2010, 10:21pm UTC](https://forums.speedlife.net/t/what-did-you-do-to-your-car-today/239557/6779 "2010-07-07T22:21:09Z")

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> [@wtb: snowmobile shock](https://forums.speedlife.net/t/wtb-snowmobile-shock/33372/3):
>
> On average people are seeing a 15% decrease in mileage during cruising, and 40% during WOT with running E85.

It heavily depends on your tune, but unless you really lean it out I’d say 15% is a very, very generous.

30-35% decrease is about what you should be getting if you do nothing but scale your VE. The O2 sensors will force proper mixture in closed loop. Lambda is lambda as far as the sensor is concerned. 9.765 for E85 = 14.7 for gasoline = 14.13 for E10 = lambda 1.0

I’ve run E85 since it became readily available, so I have a little experience.

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