# Cool thing I found out about Sunoco and Shell Gas

**URL:** <https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163>\
**Category:** SON240sx Automotive\
**Created:** [August 13, 2009, 6:16am UTC](https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163 "2009-08-13T06:16:08Z")\
**Posts on this page:** 1\
**Showing post:** 84

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**Author:** ![ronnie416](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/ronnie416/32/5480_2.png) [@ronnie416](https://forums.speedlife.net/u/ronnie416)\
**Post date:** [August 20, 2009, 7:44am UTC](https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163/84 "2009-08-20T07:44:41Z")

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> [@POLISH POWER DRINKING](https://forums.speedlife.net/t/polish-power-drinking/23623/14):
>
> So when people tune for 94, is it because their timing is too advanced/retarded that they NEED to run it?
> 
> Good info here!

Yes.

The theory behind it is, if the gas you run can resist more detonation, you can advance your timing to take advantage of that. Theres more to it than that, but that’s the basics behind it.

That’s all part of tuning. If you tune for 91, you probably won’t see any gain from running 94.

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