Fuel requirement question on my 3.8GT or Track! - Page 2 - Hyundai Genesis Forum
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  #11  
Old 07-08-2009, 02:14 PM
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I've run 87 octane, as the dealership provided, since I got the car: I've got a week up in the Muskoka's 10th-20th, and I'm going Sunoco 93 from now until the snow flies in December. After that, I don't need the extra 'pop', so I'm going back to 87 octane/regular until spring, and so on.

As everyone has said, you do get more thump from the premium/super, but it won't hurt it to put regular in if that's all you can get. Hyundai's done a really good thing tuning the turbo to take 87: My little brother had an awesome little '91 Mazda MX6 GT Turbo, and sometimes he'd have to put $10 of regular in just to get to a station with at least 91 octane, and you could feel the difference immediately, and he basically limped it where he was going. It's great we don't have to wqorry about that.

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"It's 106 miles to Chicago, we've got a full tank of gas, half a pack of cigarettes, it's dark and we're wearing sunglasses." - Elwood Blues
  #12  
Old 07-08-2009, 03:26 PM
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Gimli, to answer your question? " if you do end up switching to e85 are any Hyundai even e85-certified?

The answer is No, Hyundai's are not certified to run on e85.

I will be doing the switch over myself after further research to ensure it is what I want to do. I'm not as interested in fuel economy as most, which is obvious considering I drive a V/8 that get less than 20mpg even on a good day.

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  #13  
Old 07-09-2009, 04:58 AM
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Quote:
Originally Posted by Gimli View Post
Now ethanol has a much lower energy coefficient than gasoline, which means it doesn't store as much energy per volume and that your gas mileage will drop significantly (by as much as 5-10%) if you do end up switching to e85 (are any Hyundai even e85-certified?). That may also explain the lower gas mileage you're experiencing between regular and premium as a lot of refineries now mix up to 10% ethanol in their regular fuel.)
Hyundai has introduced 1.6 Gamma turbo running with E85 at Seoul Motor Show. It produces over 200 hp.
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  #14  
Old 07-10-2009, 06:41 PM
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Quote:
Originally Posted by tapi0 View Post
Hyundai has introduced 1.6 Gamma turbo running with E85 at Seoul Motor Show. It produces over 200 hp.
Hyundai Motor Company
I don't understand why you quoted me here. What did you want to bring attention to in my statement?

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  #15  
Old 07-11-2009, 12:52 AM
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You said "are any Hyundai even e85-certified?" and otherwise there are Hyundais coming which runs with E85.

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  #16  
Old 07-11-2009, 07:12 AM
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Quote:
Originally Posted by tapi0 View Post
You said "are any Hyundai even e85-certified?" and otherwise there are Hyundais coming which runs with E85.
Ah ok, gotcha now. The engine is still in development though, none of their current models use it, which is why I asked the question in the first place when Tufast mentioned he wanted to run e85 in his Hyundai.

I find it interesting how they released the information on that engine and how they compared it's performance to the regular gas version of the same engine. The way it's written (and I think it's deliberate) they seem to be comparing the turboed e85 version's performance against a naturally-aspirated gas version. Not really a fair or honest comparison...

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  #17  
Old 07-11-2009, 05:46 PM
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I've been running 87 octane in my 3.8 track here in the great state of Oklahoma, without any problems. I usually go to shell stations and make sure that its pure gas, none of this part alcohol bs. Trust me, as has been said, if your running below 11:1 compression (which you are) you dont need high octane gas. You are just throwing money away.

Buy, 87, tell your friends who dont know any better that your running 91.

Owned a 1984 Trans-Am with a rebuilt 305 with a 600cfm Holley carb. Car made 360 horsepower and about 320 pounds of torque (it was a monster) and It ran on 87 just fine. But, my buddy with an Acura RXS-S has a scrawny 2.0 litre, but the compression is way high, like 11:1 and the motor will knock like hell with anything less than 91. But these cars are nowhere near that compression so, really no need.

If you absolutely must, buy 89. But, I (with a bit of car knowledge, but by no means an expert) will tell you that you are throwing away your money on 91.

Put your savings into cheap light beer.

Rule of thumb that I've learned. If the motor revs over 7,000 rpm, you need 91 octane. You can take that to the bank.

By the way, if anyone else out there is studying for the bar exam and drinking by yourself. My hat goes off to you.

Last edited by Tufast; 07-11-2009 at 07:54 PM.
  #18  
Old 07-11-2009, 07:55 PM
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Welcome to the forums jakedudeta. I merged your posts for you. Take a minute to introduce yourself in the new members intro section when you get a chance.

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  #19  
Old 07-12-2009, 04:13 PM
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As allready stated, Octane rating on this car really isn't worth it if running the V6. You won't notice any change. The real thing you want to watch out for is if the gas has Ethanol in it or not. E10 gas - Which a lot of stations have now - Will lower your engine performance more then anything else. Unfortunatly, there are some areas of the country where every single gas station is a 10% ethanol blend, and there is nothing you can do about it.
  #20  
Old 07-12-2009, 07:44 PM
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i've always run high octane fuel in my car. not because it has more octane, but because it has the better cleaning agents.
I've been running shell v-power in all my cars since it came out. I've never had a high powered car, nor a boosted car. In each one, after 2 fills, the car ran noticeably smoother, started easier, and reved up more freely. None of my cars have ever had any mods, not even intakes.
1990 Chevy Corisca 4cyl
1996 Chevy Cavalier coupe 4cyl
1995 Ford Taurus sedan 3.0 6cyl
1999 VW Jetta 2.0
In all 4 of them i can attest that if i put regular fuel in, within a block or 2 it was evident the car wasn't to happy.
Not a loss of power, just ran rough, kinda sluggish in response. bogged down i guess you could say.

Honestly though, i can't figure out why anyone would run anything less than 91 octane in a Genesis. Why not make use of the factory tune for the extra power? 15hp for the 2.0 and 10hp for the 3.8 for pennies. the cost of a full tank would be maybe 4 bucks more. (in the US probably less).

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