# 2013 Audi A5 - Gas question

**URL:** <https://community.cartalk.com/t/2013-audi-a5-gas-question/141092>\
**Category:** Maintenance/Repairs\
**Tags:** audi\
**Created:** [May 27, 2019, 7:18pm UTC](https://community.cartalk.com/t/2013-audi-a5-gas-question/141092 "2019-05-27T19:18:53Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![DanDiez](https://avatars.discourse-cdn.com/v4/letter/d/f19dbf/32.png) [@DanDiez](https://community.cartalk.com/u/DanDiez)\
**Post date:** [May 27, 2019, 7:18pm UTC](https://community.cartalk.com/t/2013-audi-a5-gas-question/141092/1 "2019-05-27T19:18:54Z")

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When I first bought my car, Audi told me to use the higher octane gas which here in California is 91-94 at Gas stations. I have been told by people who know more about cars than I that I can use a lower level octanes and that the 90’s are for autos in Europe. I am hesitant in switching. What say you?

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**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\
**Post date:** [May 27, 2019, 8:13pm UTC](https://community.cartalk.com/t/2013-audi-a5-gas-question/141092/2 "2019-05-27T20:13:34Z")

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The owners manual will specify what octane is required or recommended.

If it just recommends an octane, then you can use a lower octane. but engine performance will suffer.

If it requires an octane, that’s the octane that **MUST** be used.

Tester

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**Author:** ![FoDaddy](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/fodaddy/32/717_2.png) [@FoDaddy](https://community.cartalk.com/u/FoDaddy)\
**Post date:** [May 27, 2019, 10:03pm UTC](https://community.cartalk.com/t/2013-audi-a5-gas-question/141092/3 "2019-05-27T22:03:57Z")

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Per page 186 of your owner’s manual. You can use 87 octane, but 91 octane is recommended.

_"Fuel recommendation_  
_The fuel recommended for your vehicle is unleaded premium grade gasoline. Audi recommends_  
_using TOP TIER Detergent Gasoline with a minimum octane rating of 91 AKI (95 RON). For more_  
_information on TOP TIER Detergent Gasoline,_  
_please go to the official website_  
_([www.toptiergas.com](http://www.toptiergas.com))._  
_The recommended gasoline octane rating for_  
_your engine can also be found on a label located_  
_on the inside of the fuel filler flap. This rating_  
_may be specified as AKI or RON._  
_Your vehicle may also be operated using unleaded regular gasoline with a minimum octane rating of 87 AKl/91 RON. However, using 87 AKl/91_  
_RON octane fuel will slightly reduce engine performance. "_

If it were my car I’d use premium, but that’s just me.

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**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\
**Post date:** [May 27, 2019, 10:08pm UTC](https://community.cartalk.com/t/2013-audi-a5-gas-question/141092/4 "2019-05-27T22:08:24Z")

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> [@FoDaddy](#):
>
> Per page 186 of your owner’s manual. You can use 87 octane, but 91 octane is recommended.

Do you really expect someone to reach **all** the way over to his glove box, open that box, retrieve the Owners’ Manual, and actually **READ** it?  
🤔

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**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\
**Post date:** [May 27, 2019, 11:25pm UTC](https://community.cartalk.com/t/2013-audi-a5-gas-question/141092/5 "2019-05-27T23:25:32Z")

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I’d use the premium, and I’d use Top Tier, Audis have had issues with deposits.