# witch do you find better on gas?

**URL:** https://forums.speedlife.net/t/witch-do-you-find-better-on-gas/125347
**Category:** SON240sx Automotive
**Created:** [June 13, 2009, 4:03pm UTC](https://forums.speedlife.net/t/witch-do-you-find-better-on-gas/125347 "2009-06-13T16:03:08Z")
**Posts on this page:** 1
**Showing post:** 21

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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: [June 14, 2009, 12:30pm UTC](https://forums.speedlife.net/t/witch-do-you-find-better-on-gas/125347/21 "2009-06-14T12:30:56Z")

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> [@Official NYSPEED Wii Friend codes](https://forums.speedlife.net/t/official-nyspeed-wii-friend-codes/21695/79):
>
> geez, which is better on gas…
> 
> the one that takes 87 octane or the one that takes 94 octance which is $0.25-$0.50 more per litre, mine gets 94 only, I suppose you could go with 91 but why
> 
> tough question…

You could go with 91 because it the better gas to run at average boost levels. The octane of the 94 sunoco gas is made up with mostly ethanol.

If you’re not pinging with your 91 you’re wasting money and making it harder to ignite your fuel with 94.

Higher octane does not always equal to more power or better. Use the octane that your setup requires. It’ll make more power and it’ll be cheaper.

Okay, mileage. I get about the same with KA or SR or RB20. If I’m boosting hard all day, its pretty obvious you’ll kill your gas tank faster. Good mix of both and I get the same.

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