# octane rating

**URL:** <https://forums.speedlife.net/t/octane-rating/139799>\
**Category:** Canada Nissan Automotive\
**Created:** [August 17, 2005, 6:31pm UTC](https://forums.speedlife.net/t/octane-rating/139799 "2005-08-17T18:31:34Z")\
**Posts on this page:** 8\
**Page:** 1

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**Author:** ![sandyS13](https://avatars.discourse-cdn.com/v4/letter/s/f4b2a3/32.png) [@sandyS13](https://forums.speedlife.net/u/sandyS13)\
**Post date:** [August 17, 2005, 6:31pm UTC](https://forums.speedlife.net/t/octane-rating/139799/1 "2005-08-17T18:31:34Z")

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Does anyone know if it is necessary to put in 91 Octane in my 91 KA24DE? Has anyone noticed any differences in using 87 or 85?

Anthony

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**Author:** ![RS13](https://avatars.discourse-cdn.com/v4/letter/r/46a35a/32.png) [@RS13](https://forums.speedlife.net/u/RS13)\
**Post date:** [August 17, 2005, 7:08pm UTC](https://forums.speedlife.net/t/octane-rating/139799/2 "2005-08-17T19:08:51Z")

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87 is fine unless you advance the timing but its not required at all

i found my old motor worked best on 87 octane

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**Author:** ![DeathBy240](https://avatars.discourse-cdn.com/v4/letter/d/258eb7/32.png) [@DeathBy240](https://forums.speedlife.net/u/DeathBy240)\
**Post date:** [August 21, 2005, 9:19pm UTC](https://forums.speedlife.net/t/octane-rating/139799/3 "2005-08-21T21:19:26Z")

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Where the hell do they sell 85?

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**Author:** ![qualthar](https://avatars.discourse-cdn.com/v4/letter/q/74df32/32.png) [@qualthar](https://forums.speedlife.net/u/qualthar)\
**Post date:** [August 21, 2005, 10:08pm UTC](https://forums.speedlife.net/t/octane-rating/139799/4 "2005-08-21T22:08:12Z")

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Lowest octane I’ve ever seen is 87 :?

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**Author:** ![Kramer240sx](https://avatars.discourse-cdn.com/v4/letter/k/c37758/32.png) [@Kramer240sx](https://forums.speedlife.net/u/Kramer240sx)\
**Post date:** [August 21, 2005, 11:25pm UTC](https://forums.speedlife.net/t/octane-rating/139799/5 "2005-08-21T23:25:37Z")

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_cough illegal farm gas cough_

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**Author:** ![Chromedragon](https://avatars.discourse-cdn.com/v4/letter/c/ba8739/32.png) [@Chromedragon](https://forums.speedlife.net/u/Chromedragon)\
**Post date:** [August 22, 2005, 4:41am UTC](https://forums.speedlife.net/t/octane-rating/139799/6 "2005-08-22T04:41:20Z")

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97% - 87 octane + 3% 0 octane human urine = 85 octane :o

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**Author:** ![sandyS13](https://avatars.discourse-cdn.com/v4/letter/s/f4b2a3/32.png) [@sandyS13](https://forums.speedlife.net/u/sandyS13)\
**Post date:** [August 22, 2005, 3:42pm UTC](https://forums.speedlife.net/t/octane-rating/139799/7 "2005-08-22T15:42:46Z")

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Just sleeping at the wheel boyz. Didn’t realize I put 85. Although the rotary engine N/A actually runs better on low octane. All the IMSA wins was done on an absurdly low octane like 79 or something.

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**Author:** ![imported\_silvia](https://avatars.discourse-cdn.com/v4/letter/i/e79b87/32.png) [@imported\_silvia](https://forums.speedlife.net/u/imported_silvia)\
**Post date:** [August 22, 2005, 10:30pm UTC](https://forums.speedlife.net/t/octane-rating/139799/8 "2005-08-22T22:30:04Z")

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Lower octane id easyer to ignite. But often ignites too early in high horsepower or hot running engines causung detonation. So basicaly, If you can run lower octane safely, it will give you more power.