# Esso, PetroCanada, Shell and Sunoco?

**URL:** https://forums.speedlife.net/t/esso-petrocanada-shell-and-sunoco/105726
**Category:** SON240sx Automotive
**Created:** [April 19, 2007, 10:36am UTC](https://forums.speedlife.net/t/esso-petrocanada-shell-and-sunoco/105726 "2007-04-19T10:36:02Z")
**Posts on this page:** 1
**Showing post:** 32

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### Author: ![roast](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/roast/32/5498_2.png) [@roast](https://forums.speedlife.net/u/roast)
#### Post date: [April 21, 2007, 1:19pm UTC](https://forums.speedlife.net/t/esso-petrocanada-shell-and-sunoco/105726/32 "2007-04-21T13:19:04Z")

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> [@i need a daily driver](https://forums.speedlife.net/t/i-need-a-daily-driver/12185/41):
>
> yea, stock KA is only good for 87 octane, anything else is just a waste of money. If you have installed high compression pistons, or your boosted, or you have an ECU tuned for it, then you need higher octane 91-94 or your engine will detonate,knock w.e which is really bad…

If I bump the timing i usually run 91 on my KA.

I’m thinking of running 89 in hot weather with stop and go traffic.

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