[Veloster N 62]

(knock sensors) electro mechanical sensors attached to the block that detect knock and detonation. They detect knock or detonation, then send the signals to the ECU. The ECU the attempts to retard the timing within the parameters the ECU was programmed. knock is caused by premature ignition.

@ mattblowers Here's some more information for you to digest.
Fuel Octane Selection


Go ahead and keep up your stubborn and ignorant thinking (no offense), which they specifically recommend in the owners manual. You underwriter is not familiar with the 2.0T Theta II motor used in the N. It has a 9:5.1 with turbocharging which produces 20 psi of boost. In essence, much greater compression and bang.

You need to understand what turbocharging does and how it effects the actual compression of the motor. You are running the risk of premature ignition, which leads directly to knocking and detonation. This is a quick death of a motor.

Don't say we didn't tell you so. Do what you want but you been truthfully informed.

Do you honestly think MotorTrend or your service underwriter will pay for your blown motor? (NOT) Hyundai states 91+ octane fuel, not E85. If you continue to run 87 octane it will shorten the life of the motor and a likely denial of your warranty claim will result. Just because you were being cheap and decided to pay $2.50 less at the pump for fill up. If you can't afford to pay what Hyundai recommends, then maybe you ought to have purchased an Accent.? It can safely run 89 octane fuel. What you're equating is; it's alright to run 87 octane fuel in any or all turbocharged cars. That's just wrong!

We've tried to inform you truthfully and if you want to continue in this folly, it's your decision. Just remember we told you so, directly!

 

[nomad17]

I've run nothing below premium in any of my vehicles, and won't in the N either. But if the dealership says 87 is fine, and they sell me an N with a full tank of gas I have to assume they filled it with regular unleaded. Should we be scheduling appointments to have it siphoned out? What about the people that already burned through it?

My uneducated guess (hope) is that the ecm will adjust safely but that 91 octane should be used.

 

[Veloster N 62]

Do what you want.

It's doubtful, as mine was filled with 91 from new. The salesman and dealership both said, they'd fill it up for me when I purchased it. (two tanks fulls besides the original). They've only had two and are one of the largest automotive groups in the US.

Got two USB plugs from Hyundai Corporate and a Yeti mug also.

Not good to keep filling it up with 87 or 89 either. Do what the owners manual states and there's no worries.

 

[PcChip]

How many other Hyundai models on the lot require 91 octane? I don't the answer but I'm guessing it's a low number (possibly even 0?) I hope my dealership put 91 octane in before I took delivery of it but something tells me chances are low, especially with a relatively new model that may have requirements dealerships are not accustomed to yet.

When I bought mine (Hiley Hyundai, Burleson TX), they filled it up with 87 and told me 87 was fine

I've run 93 in it every time since

 

[Veloster N 62]

One tank isn't going to cause a problem. Continued use under higher loads, will. Breaking in, you're not running the N above 4500 rpm and varying the throttle load. Once it's broke in you obviously will put a much heaver throttle load on the engine.

 

[mattblowers]

(knock sensors) electro mechanical sensors attached to the block that detect knock and detonation. They detect knock or detonation, then send the signals to the ECU. The ECU the attempts to retard the timing within the parameters the ECU was programmed. knock is caused by premature ignition.

@ mattblowers Here's some more information for you to digest.
Fuel Octane Selection


Go ahead and keep up your stubborn and ignorant thinking (no offense), which they specifically recommend in the owners manual. You underwriter is not familiar with the 2.0T Theta II motor used in the N. It has a 9:5.1 with turbocharging which produces 20 psi of boost. In essence, much greater compression and bang.

You need to understand what turbocharging does and how it effects the actual compression of the motor. You are running the risk of premature ignition, which leads directly to knocking and detonation. This is a quick death of a motor.

Don't say we didn't tell you so. Do what you want but you been truthfully informed.

Do you honestly think MotorTrend or your service underwriter will pay for your blown motor? (NOT) Hyundai states 91+ octane fuel, not E85. If you continue to run 87 octane it will shorten the life of the motor and a likely denial of your warranty claim will result. Just because you were being cheap and decided to pay $2.50 less at the pump for fill up. If you can't afford to pay what Hyundai recommends, then maybe you ought to have purchased an Accent.? It can safely run 89 octane fuel. What you're equating is; it's alright to run 87 octane fuel in any or all turbocharged cars. That's just wrong!

We've tried to inform you truthfully and if you want to continue in this folly, it's your decision. Just remember we told you so, directly!

Calm down dude, you're gonna experience premature detonation yourself. I don't know why you feel so threatened that someone you don't know on the internet isn't automatically taking your word for it. For all I know you could be a master mechanic/engineer/tuner from Hyundai that was on site at the Nürburgring testing or you could be a pimply faced teenager living in your mothers basement playing video games and trolling car forums because you watched some Youtube video reviews and think you know. The point is, I don't know you. "Stubborn and ignorant"? What a contumelious thing to say! Typing '(no offense)' after it, doesn't make it any less offensive. Furthermore insinuating that I can't afford the fuel and should have bought an Accent, that was an especially nice touch. For the record, I didn't have to go to their finance department for anything other than handing them a check and signing the paperwork. I even stated that I am running 91+ in my car and plan on continuing to do so. I simply want to know what the correct answer is.

I purchased an 87 Grand National in high school and ran that car until 150,000+ miles (hint: it's a turbo car before turbo was the thing). I've owned quite a range of sports cars and still ride and work on high performance motorcycles. Some require premium fuel, some do not. It always comes down to how it was engineered and what the people who built it say. For me not to get a straight answer is inexcusable. Considering that most people don't read owners manuals and that the car itself says nothing and dealers are giving out conflicting information (not to mention poor information in reviews and from the EPA), we are surely are headed for a lot of "my motor blew up" threads if Premium fuels are required. That will be a shame if it's because of misinformation. Surely Hyundai knows what Motor Trend wrote (it was in the headline!) and could easily rectify this with a service bulletin to their dealers. Yay for you that feel yourself a self-proclaimed expert (again maybe you are). I didn't fall off the turnip truck yesterday or the day before and I've been turning wrenches for more years than the average reviewer of this car has been alive. I've rebuilt everything from lawn mowers to 1200 HP Caterpiller motors so I could do with a bit less condescension and your felt need to 'explain' me. I simply shared my story of wanting to know and asking Hyundai for an answer.

 

[mattblowers]

To point of order, the service manual on the myHyundai BlueLink app has an owners manual. I've posted an image below. I believe the discrepancy might be coming from the fact that Hyundai appears to have linked their digital copies of the manual and service guide with the non-N version Velosters. The manual in my car is specific to my N, the online is not. In either case it's an oversight that I hope they correct.


NOTE: (before someone flips a gasket) I'm NOT saying this is correct. Keep using premium. I'm only showing what is on the online owners manual in BlueLink as of today (5/16/19).

 

[Veloster N 62]

To point of order, the service manual on the myHyundai BlueLink app has an owners manual. I've posted an image below. I believe the discrepancy might be coming from the fact that Hyundai appears to have linked their digital copies of the manual and service guide with the non-N version Velosters. The manual in my car is specific to my N, the online is not. In either case it's an oversight that I hope they correct.


NOTE: (before someone flips a gasket) I'm NOT saying this is correct. Keep using premium. I'm only showing what is on the online owners manual in BlueLink as of today (5/16/19).

Go ahead run 87 in it and when it blows up, I'll be one of the first to laugh and I mean hard.:grin:

Keep drinking that KoolAid!:wink:

 

[Rob...E]

Go ahead run 87 in it and when it blows up, I'll be one of the first to laugh and I mean hard.:grin:

Keep drinking that KoolAid!:wink:

Man your a crusty old fart, he already said he was going to run premium.

 

[Veloster N 62]

I probably am! :grin: However, he's got an obsession with this 87 octane thing and I really don't care what he does at this point.

The page your referencing is for the 1.6T Gamma II motor.

I do like one thing though and it's making me laugh;

No offense, but I wanted to know for certain and not rely on 'some guy on the internet said.

He's doing exactly the reverse of what he states here. "He's relying and asking a bunch of guys on the Internet!" LMAO . Now that's funny!!:grin:

 

[mattblowers]

I probably am! :grin: However, he's got an obsession with this 87 octane thing and I really don't care what he does at this point.

The page your referencing is for the 1.6T Gamma II motor.

I do like one thing though and it's making me laugh;

He's doing exactly the reverse of what he states here. "He's relying and asking a bunch of guys on the Internet!" LMAO . Now that's funny!!:grin:

Obsession? It's the title of the f-ing thread.

You are ruining this forum for me. Time for me to take a break. I hope we never encounter each other IRL. Peace out.

 

[guygeo]

In french, guys we say: Prenez votre gas égal...

 

[Veloster N 62]

Obsession? It's the title of the f-ing thread.

You are ruining this forum for me. Time for me to take a break. I hope we never encounter each other IRL. Peace out.

Yes, obsession or compulsion, take your pick.
The Title says: "Gas Requirements Not, Running "87 Octane in your Veloster N." The fuel requirement is 91 octane. Let it go, man!!:wink:

I'm ruining this forum for you?

Don't blame me, for your own personal mindset. "Take responsibility for your own thoughts and comments. What hubris! Trust me, you and I won't, with your negative attitude!

The sport bikes I own have much higher compression and redline in the stratosphere compared to the N and I only run 87 octane unless I'm having ethanol issues (it sucks in bikes) and trying to clean it up.

Oh and running 87 octane in a Sport Bike, is just another disregard for the manufactures premium fuel requirements. It's not ignorance it's something else. Anything which has a compression ratio of 10:5.1 and above requires it! The majority of all Sports Bikes produced within the last decade, run a compression ratio of 11:5.1 and higher. Yeah I've had a few dozen or so in my lifetime. However, we aren't talking about motorcycles or Honda Si's.

Prenez votre gas éga

Take your gas even??:wink::grin:

 

[StageVClinger]

I just ran through my first tank of 87 that was provided by the dealer, I've got almost 50 miles now on 93 and I honestly can tell no difference, I'll try 89 next, I always ran 89 in my Speed3 and it felt faster on it for some reason (no dyno runs, just seat of the pants), I think anything 87-93 is fine in these cars, I'm guessing they're not high compression being a turbo car.

 

[nomad17]

I received an official response saying 87 was fine, however it also said I could find this info in my manual and we all know it clearly says 91 there..

The bold print below the requirement says using lower octane may reduce power and increase consumption but doesn't necessarily specify "damage".

Definitely still conflicting info between Hyundai and dealerships. I wouldn't run less than 91 in it, just hoping all the N's being sold with a tank full of 87 suffer no excessive detonation.

 

[SAWKVN]

I received an official response saying 87 was fine, however it also said I could find this info in my manual and we all know it clearly says 91 there..

The bold print below the requirement says using lower octane may reduce power and increase consumption but doesn't necessarily specify "damage".

Definitely still conflicting info between Hyundai and dealerships. I wouldn't run less than 91 in it, just hoping all the N's being sold with a tank full of 87 suffer no excessive detonation.

I'm trusting Hyundai before I ever trust a salesperson at a dealership. Salespeople sell cars, they will tell you the car will run on cucumbers to sell a car. They do not give a ****.

Mine was sold w/ a full tank of 87 and that's the last tank it will ever have of 87. I don't mind spending 3-4 more dollars on a tank of gas and to be honest I don't understand the point of trying to run this car on anything but. If 3-4 dollars a tank is going to break you, I think you may have bought the wrong car.

 

[nomad17]

Yeah I mean Hyundai Motor America told me 87 octane, same as the dealership. I think they probably both have the same bad info, or the manual is saying required when it's more of a "strongly recommended". Either way I just hope everyone gets on the same page soon.

 

[Ghost]

I run 93. That's the highest octane I can get here for pump gas.

-Mike

 

[LateralGrip]

In Alabama we have access to 93. The recommended fuel is the minimum and what is used for the manufacturers power and TQ testing. My GT350R minimum is was also 93 but I only ran 93 on the street and 98 on the track.

 

[natoe87]

In Alabama we have access to 93.

Access to 93 but not to abortions. Too soon?