[garyahouse]

The gasoline is rated differently in different locations in the world...Canada, England, Australia, Asia, Europe use RON ratings. The US ratings for our Regular 87 octane = 91 RON octane of the other countries. So we use 87 and it's the same gasoline as 91 in the other locations. The difference is the definition and calculation, causing so much confusion.

Note that the OP's title for this thread begins with the word, "Premium."

 

[BlackJeepConvertible]

Turbo = premium regardless of car

 

[garyahouse]

Turbo = premium regardless of car

Who told you that?

 

[texasslim2010]

Is there any documentation to support your comment on there being a recall? I don't believe anything unless Hyundai sends such notice and I haven't received anything. Manual says 91 octane or higher. If engine fails, I would love to know your defense other than "maybe, or I think, or something is the mail as far as recall".

I have a 2023 Hyundai Tucson Hybrid and the manual says to use Regular unleaded or higher, meaning you don't have to use 93 octane, you can use 87 octane if thats what you prefer to use and it wont damage your engine.

 

[mreg376]

Turbo = premium regardless of car

So definitive and authoritative...and yet...false.
Of course, you're free to use 93 octane of you wish. You are also free to stand at the window and throw dollar bills outside.

 

[Tampa8]

I have a 2023 Hyundai Tucson Hybrid and the manual says to use Regular unleaded or higher, meaning you don't have to use 93 octane, you can use 87 octane if thats what you prefer to use and it wont damage your engine.

Did you read the posts, there is a reason why he said that. Your 2023 says that, his 2022 did not.

 

[AsherN]

Did you read the posts, there is a reason why he said that. Your 2023 says that, his 2022 did not.

The confusion comes from the difference between octane and RON. My manual states:

Your new vehicle is designed to perform optimally with unleaded fuel having an octane number ((R=M)/2) of 87 (Research Octane Number 91) or higher.

 

[Tampa8]

The confusion comes from the difference between octane and RON. My manual states:

Your new vehicle is designed to perform optimally with unleaded fuel having an octane number ((R=M)/2) of 87 (Research Octane Number 91) or higher.

That shouldn't be confusion this is far from new, that is what I would say all the manuals for cars have said for years. RON is what Europe uses so they would put in RON 91 at the pump - which is the equivalent of 87 octane here and Canada.

Here's how Nissan words it -
"Use unleaded regular gasoline with an octane rating of at least 87 AKI (Anti-Knock Index) number (Research octane number 91)."

 

[PowerJrod]

2022 Hyundai Tucson SEL: I'm hoping someone can help with the following statement in the vehicle manual:

This is for the base engine, a naturally aspirated inline 4 cylinder (Smartstream G 2.5 GDI). I was more than surprised to see this... Hyundai dealers are advertising this trim as using regular gasoline, as does fueleconomy.gov. This statement in the manual goes beyond the more typical "premium gasoline is recommended", as it implies premium gasoline is required. I called the dealer who told me premium was recommended only, not required, and they filled the vehicle with regular the day I purchased the vehicle. But the vehicle manual should hold the "truth". My plan is to go ahead and use premium for now - can anyone tell me if this statement is indeed correct? Should I be using premium gasoline? The base Sonata has the same engine with regular gasoline only in vehicle manual, though engine may be tuned differently?

The manual for 2023 Tucson SEL states "minimum of 87 octane". Your engine wouldn't benefit from 91 at all. If you don't want to use 87...use 89.
91 is for turbo or Porsche style-designed engines.