# Ethanol

**URL:** <https://community.cartalk.com/t/ethanol/16315>\
**Category:** The Show\
**Created:** [July 7, 2008, 1:07am UTC](https://community.cartalk.com/t/ethanol/16315 "2008-07-07T01:07:58Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![okieed42](https://avatars.discourse-cdn.com/v4/letter/o/c77e96/32.png) [@okieed42](https://community.cartalk.com/u/okieed42)\
**Post date:** [July 7, 2008, 1:07am UTC](https://community.cartalk.com/t/ethanol/16315/1 "2008-07-07T01:07:58Z")

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How come when I use 10% ethanol that I am advised to go up a grade from 87 to 91 in my lawn equipment. Both 2 and 4 cycle equipment. Should I consider doing this with my '96 grand voyger with 155k?

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**Author:** ![Joseph\_E\_Meehan](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/joseph_e_meehan/32/21_2.png) [@Joseph\_E\_Meehan](https://community.cartalk.com/u/Joseph_E_Meehan)\
**Post date:** [July 7, 2008, 10:45am UTC](https://community.cartalk.com/t/ethanol/16315/2 "2008-07-07T10:45:46Z")

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I can think of no logical reason at all. It makes no sense to me.

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**Author:** ![bedrock](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/bedrock/32/868_2.png) [@bedrock](https://community.cartalk.com/u/bedrock)\
**Post date:** [July 7, 2008, 2:04pm UTC](https://community.cartalk.com/t/ethanol/16315/3 "2008-07-07T14:04:40Z")

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up grade to 91 gas for a lawnmow is bad it will burn your valve up.

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**Author:** ![Ron-man](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/ron-man/32/739_2.png) [@Ron-man](https://community.cartalk.com/u/Ron-man)\
**Post date:** [July 7, 2008, 2:13pm UTC](https://community.cartalk.com/t/ethanol/16315/4 "2008-07-07T14:13:13Z")

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If you are advised to use 91 octane fuel in your lawn equipment, who makes it, BMW?

Read the owner’s manual for each appliance and use the fuel recommended by the manufacturer.

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**Author:** ![jtsanders](https://avatars.discourse-cdn.com/v4/letter/j/c2a13f/32.png) [@jtsanders](https://community.cartalk.com/u/jtsanders)\
**Post date:** [July 7, 2008, 3:35pm UTC](https://community.cartalk.com/t/ethanol/16315/5 "2008-07-07T15:35:05Z")

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Toro recommends 87 octane fuel for 2-stroke and 4-stroke engines. They even say that higher octane levels serve no useful purpose.