# 93 Rx7 Ls2 Project.

**URL:** <https://forums.speedlife.net/t/93-rx7-ls2-project/196180>\
**Category:** Builds\
**Created:** [March 18, 2008, 5:45am UTC](https://forums.speedlife.net/t/93-rx7-ls2-project/196180 "2008-03-18T05:45:59Z")\
**Posts on this page:** 1\
**Showing post:** 382

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**Author:** ![edcmat-l1](https://avatars.discourse-cdn.com/v4/letter/e/e19b73/32.png) [@edcmat-l1](https://forums.speedlife.net/u/edcmat-l1)\
**Post date:** [June 2, 2010, 9:51am UTC](https://forums.speedlife.net/t/93-rx7-ls2-project/196180/382 "2010-06-02T09:51:29Z")

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> [@moment of truth](https://forums.speedlife.net/t/moment-of-truth/42325/4):
>
> and it’s cheaper than 87 octane. Why the hell not use it? Like I said, just keep a 91 tune handy and then you’re fine.
> 
> -TJ

It may be cheaper per gallon, but it requires far more volume to make the same power, so the cost is actually a trade off. By the time you calculate how much you’re using, it’s probably costing you more.

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