# 2019 Toyota Avalon Hybrid - Bad gas?

**URL:** <https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391>\
**Category:** Maintenance/Repairs\
**Tags:** toyota\
**Created:** [December 17, 2020, 4:18pm UTC](https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391 "2020-12-17T16:18:15Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![Ralphee](https://avatars.discourse-cdn.com/v4/letter/r/b9bd4f/32.png) [@Ralphee](https://community.cartalk.com/u/Ralphee)\
**Post date:** [December 17, 2020, 4:18pm UTC](https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391/1 "2020-12-17T16:18:16Z")

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2019 Toyota Avalon Hybrid.  
rough idle for a month Car has been at dealer twice for problem.  
dealer recommendation bad gas.  
after Toyota engineering and mechanics can not determine issue.  
car has 37.000 miles on it all freeway.

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**Author:** ![Purebred](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/purebred/32/46796_2.png) [@Purebred](https://community.cartalk.com/u/Purebred)\
**Post date:** [December 17, 2020, 7:09pm UTC](https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391/2 "2020-12-17T19:09:29Z")

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Are you using TopTier certified gas? Try adding Techron or SeaFoam next fill op.

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**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\
**Post date:** [December 18, 2020, 2:07am UTC](https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391/3 "2020-12-18T02:07:53Z")

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Dealer simply didn’t want to take the time to actually diagnose the problem. Bad gas is rare.

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**Author:** ![Nevada\_545](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/nevada_545/32/41232_2.png) [@Nevada\_545](https://community.cartalk.com/u/Nevada_545)\
**Post date:** [December 18, 2020, 2:39am UTC](https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391/4 "2020-12-18T02:39:40Z")

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> [@old\_mopar\_guy](#):
>
> Dealer simply didn’t want to take the time to actually diagnose the problem.

What problem?

There are some vehicle owners that complain that their car is not quiet enough or smooth enough, doesn’t prove that there is a failure.

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**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\
**Post date:** [December 18, 2020, 4:50am UTC](https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391/5 "2020-12-18T04:50:51Z")

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Bad gas is always a possibility but I consider it a bit of a rarity anymore. If contamination is suspected then a fuel sample should be taken to prove or disprove this scenario rather than make a blind assumption.

I might ask this question though. Does the tach needle waver any?

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**Author:** ![old\_mopar\_guy](https://avatars.discourse-cdn.com/v4/letter/o/6bbea6/32.png) [@old\_mopar\_guy](https://community.cartalk.com/u/old_mopar_guy)\
**Post date:** [December 18, 2020, 12:17pm UTC](https://community.cartalk.com/t/2019-toyota-avalon-hybrid-bad-gas/173391/6 "2020-12-18T12:17:30Z")

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This problem. rough idle for a month