# 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:** 80

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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, 7:23am UTC](https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163/80 "2009-08-20T07:23:14Z")

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> [@Performance Car Builder in Rochester](https://forums.speedlife.net/t/performance-car-builder-in-rochester/23624/11):
>
> So how about turbo vehicles than that come from the factory? I’m sure you can use 85 gas in it?
> 
> Also, why do all tuners tune cars for either 91 or 94?
> 
> Must be a logical reason.

Lots of turbo factory vehicles require 91…thats a 95 RON or higher.

Pretty much any turbo car calls for a 90 minimum for optimal runing condition, anything lower and the the knock senor pulls timing.

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