# Gas Question **URL:** \ **Category:** SON240sx Automotive\ **Created:** [June 15, 2005, 12:40pm UTC](https://forums.speedlife.net/t/gas-question/86436 "2005-06-15T12:40:34Z")\ **Posts on this page:** 18\ **Page:** 1
**Author:** ![Jedi\_Car\_Fan](https://avatars.discourse-cdn.com/v4/letter/j/b9e5f3/32.png) [@Jedi\_Car\_Fan](https://forums.speedlife.net/u/Jedi_Car_Fan)\ **Post date:** [June 15, 2005, 12:40pm UTC](https://forums.speedlife.net/t/gas-question/86436/1 "2005-06-15T12:40:34Z")
Just curious is all but who is running what in what ? ka, sr etc… 87, 91, 93, 94 ? Ive read on some more american based 240 boards that they only get 91 for the highest oct in the states? so how is 91 on SR ? I usually put in 94 but when I’m lazy and dont want to find a sunoco I’ll put in $10 of 93. ---
**Author:** ![240\_Foz](https://avatars.discourse-cdn.com/v4/letter/2/dc4da7/32.png) [@240\_Foz](https://forums.speedlife.net/u/240_Foz)\ **Post date:** [June 15, 2005, 12:47pm UTC](https://forums.speedlife.net/t/gas-question/86436/2 "2005-06-15T12:47:08Z")
I use 89 in my KA every fill. ---
**Author:** ![Matt-chu](https://avatars.discourse-cdn.com/v4/letter/m/a6a055/32.png) [@Matt-chu](https://forums.speedlife.net/u/Matt-chu)\ **Post date:** [June 15, 2005, 12:51pm UTC](https://forums.speedlife.net/t/gas-question/86436/3 "2005-06-15T12:51:40Z")
SR’s are fine on 91 unless they are running crazy numbers. Thats all I put in my car. ---
**Author:** ![Solarian](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/solarian/32/5514_2.png) [@Solarian](https://forums.speedlife.net/u/Solarian)\ **Post date:** [June 15, 2005, 1:12pm UTC](https://forums.speedlife.net/t/gas-question/86436/4 "2005-06-15T13:12:12Z")
I run 91 on my bone stock KA b/c that’s what the booklet tells me 😃 ---
**Author:** ![Sven](https://avatars.discourse-cdn.com/v4/letter/s/e47c2d/32.png) [@Sven](https://forums.speedlife.net/u/Sven)\ **Post date:** [June 15, 2005, 1:27pm UTC](https://forums.speedlife.net/t/gas-question/86436/5 "2005-06-15T13:27:45Z")
How it works: Higher octane = resists pre detonation (aka harder to ignite) Basically you should run the lowest octane that doesn’t cause knocking in your engine. If you are bone stock you should run 87 (for a KA … don’t ask me about sr) Advanced timing, cams, higher compression, turbo, etc etc = you’ll likely need/want a higher octane to prevent detonation. But the point i’m trying to get across is that if you are not having problems with detonation buying more expensive fuel is just flushing your money down the toilet. ---
**Author:** ![s14\_2Nv](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/s14_2nv/32/5476_2.png) [@s14\_2Nv](https://forums.speedlife.net/u/s14_2Nv)\ **Post date:** [June 15, 2005, 1:31pm UTC](https://forums.speedlife.net/t/gas-question/86436/6 "2005-06-15T13:31:08Z")
Only 94 for my ka. ---
**Author:** ![Sven](https://avatars.discourse-cdn.com/v4/letter/s/e47c2d/32.png) [@Sven](https://forums.speedlife.net/u/Sven)\ **Post date:** [June 15, 2005, 1:37pm UTC](https://forums.speedlife.net/t/gas-question/86436/7 "2005-06-15T13:37:52Z")
^^ jealous. one day i’ll be there … if i ever finish school. 😢 ---
**Author:** ![spilner](https://avatars.discourse-cdn.com/v4/letter/s/f17d59/32.png) [@spilner](https://forums.speedlife.net/u/spilner)\ **Post date:** [June 15, 2005, 2:13pm UTC](https://forums.speedlife.net/t/gas-question/86436/8 "2005-06-15T14:13:03Z")
94 when its not brutally expensive. never less than 91 tho no matter what the cost. i notice no difference between the two. ---
**Author:** ![Fobwall](https://avatars.discourse-cdn.com/v4/letter/f/7ea924/32.png) [@Fobwall](https://forums.speedlife.net/u/Fobwall)\ **Post date:** [June 15, 2005, 2:23pm UTC](https://forums.speedlife.net/t/gas-question/86436/9 "2005-06-15T14:23:37Z")
my KA runs on water 😃 lol ---
**Author:** ![SHIFT\_KA24DET](https://avatars.discourse-cdn.com/v4/letter/s/b9bd4f/32.png) [@SHIFT\_KA24DET](https://forums.speedlife.net/u/SHIFT_KA24DET)\ **Post date:** [June 15, 2005, 3:51pm UTC](https://forums.speedlife.net/t/gas-question/86436/10 "2005-06-15T15:51:08Z")
I run Petro Canada 91 every time not matter the price, I get a min of 40+km to the tank using 91 as apose to 87. KA’s were designed for 91 Octane. They automajically retard timing when running under 91 octane hindering preformance and milage. ---
**Author:** ![TorontoGT-R33](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/torontogt-r33/32/5500_2.png) [@TorontoGT-R33](https://forums.speedlife.net/u/TorontoGT-R33)\ **Post date:** [June 15, 2005, 3:52pm UTC](https://forums.speedlife.net/t/gas-question/86436/11 "2005-06-15T15:52:47Z")
I always use 91 and up. ---
**Author:** ![Cal](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/cal/32/5505_2.png) [@Cal](https://forums.speedlife.net/u/Cal)\ **Post date:** [June 15, 2005, 3:56pm UTC](https://forums.speedlife.net/t/gas-question/86436/12 "2005-06-15T15:56:45Z")
I used to use Petro Canada 91, but since the build i only use 94 ---
**Author:** ![NeveR](https://avatars.discourse-cdn.com/v4/letter/n/e95f7d/32.png) [@NeveR](https://forums.speedlife.net/u/NeveR)\ **Post date:** [June 15, 2005, 5:23pm UTC](https://forums.speedlife.net/t/gas-question/86436/13 "2005-06-15T17:23:23Z")
Only run 94. My car tells me to do it. Any lower and it’s like “I hate you.” ---
**Author:** ![spd-dmn](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/spd-dmn/32/5513_2.png) [@spd-dmn](https://forums.speedlife.net/u/spd-dmn)\ **Post date:** [June 15, 2005, 8:22pm UTC](https://forums.speedlife.net/t/gas-question/86436/14 "2005-06-15T20:22:27Z")
> [@SHIFT\_KA24DET](#): > > I run Petro Canada 91 every time not matter the price, I get a > min of 40+km to the tank using 91 as apose to 87. KA’s were > designed for 91 Octane. They automajically retard timing when > running under 91 octane hindering preformance and milage. I run 87 and get almost 600 highway… about 450-500 city. ---
**Author:** ![Ed1](https://avatars.discourse-cdn.com/v4/letter/e/958977/32.png) [@Ed1](https://forums.speedlife.net/u/Ed1)\ **Post date:** [June 15, 2005, 9:18pm UTC](https://forums.speedlife.net/t/gas-question/86436/15 "2005-06-15T21:18:48Z")
lol what would 87 do to a 1.8 turbo when it’s already runing rich? ---
**Author:** ![newbieracer](https://avatars.discourse-cdn.com/v4/letter/n/e47c2d/32.png) [@newbieracer](https://forums.speedlife.net/u/newbieracer)\ **Post date:** [June 15, 2005, 10:06pm UTC](https://forums.speedlife.net/t/gas-question/86436/16 "2005-06-15T22:06:43Z")
i use 91 seems to be the best. and fuck mike ur car must be running great, i couldnt make it to windsor 500k without stoping for gas, Mind you the windows were all down ---
**Author:** ![dabum](https://avatars.discourse-cdn.com/v4/letter/d/41988e/32.png) [@dabum](https://forums.speedlife.net/u/dabum)\ **Post date:** [June 15, 2005, 10:30pm UTC](https://forums.speedlife.net/t/gas-question/86436/17 "2005-06-15T22:30:28Z")
i hope everyone using 90+ octane is running some sort of forced induction, high compression or has a really old motor that knocks otherwise like someone said in previous post, waste of money. ---
**Author:** ![Sven](https://avatars.discourse-cdn.com/v4/letter/s/e47c2d/32.png) [@Sven](https://forums.speedlife.net/u/Sven)\ **Post date:** [June 16, 2005, 11:57am UTC](https://forums.speedlife.net/t/gas-question/86436/18 "2005-06-16T11:57:03Z")
Mr Jantos claims the motor backs off timing if you put lower octane but I didn’t think it was that advanced. The way I understand it the engine runs normally … then if the knock sensor decides the engine is pinging then it severly retards the timing. Not butter. Adam ?