# 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:** 30

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**Author:** ![duckJAI](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/duckjai/32/5553_2.png) [@duckJAI](https://forums.speedlife.net/u/duckJAI)\
**Post date:** [August 13, 2009, 10:26am UTC](https://forums.speedlife.net/t/cool-thing-i-found-out-about-sunoco-and-shell-gas/127163/30 "2009-08-13T10:26:47Z")

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> [@FS torpedo heater](https://forums.speedlife.net/t/fs-torpedo-heater/23404/13):
>
> Do not expect a huge difference right away.
> 
> ECM needs to realize and re-map the system for the fuel.
> 
> Always takes a few tank fulls

I’ve been told it’s only like 20 minutes for the ECU to re-tune itself.

Maybe that’s just for Subbies.

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