Premium Fuel
 

Due to its high compression ratio the car will require premium fuel. If you had to use regular couldn't you just boost octane rating by using a methanol injection kit? If its possible then I don't know why people are complaining about its requirement for premium.

Installing a methanol injection kit seems like more trouble then just pressing the premium button at the pump.

i had plans on a turbo setup anyways >:]

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Oh, and for the OP with the ever so inspiring username.

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i know theres another thread about this but i just had a thought, where i live here in california the highest octane is 91.. and some places go up to 93 and 91 is considered the plus version of gas.. so you could get away with just pumping 91

No, really. If you buy a ~$24k car with plans to turbocharge it, you better be prepared to pay the increased fuel cost. Or run E85.

Seriously? You can't afford the 2 bucks a tank?

Srsly. He's more than willing to spend $24k+ on a brand new car and $5k+ on a turbo kit for it, but he's balking at paying ~$0.30 more per gallon?

Exactly. Which amounts to what, $3 extra per fill-up? That is like an extra $60-80 a year. lol Chump change.

lol if you're complaining about premium gas then there's a problem.

I completely agree, but for me it'll be an extra $400 a year, since I drive upwards of 40k a year. I still think it isn't a large price to pay, just saying it could equate to a lot more than $60-$80 a year lol I think I'm certainly on the high side of this cost and I'm still not complaining so I don't see how anyone else can.

here in canada the, we have 94 octane, but its really rare, the premium that every gaz station has is 91 octane. i dont know why we cant have higher octane like europe or other place in the world exept north america.

im in paphos cyprus right now and the normal unleaded is 95 and premium is 98. i wish i can have 98 octane in canada. i dont care paying for more quality gaz in my fr-s.

It's pretty much the same gas, the rating system is just different :thumbsup:

94 octane in canada is the same as 98 octane in aus. its just different countries have different ways to name/class the fuel.

are you guys sure about that?

i mean, its confusing.

anyway, i will fill my fr-s with 94 oct only.

Its not that serious to go through all that trouble to save $2 a week

Might as well skip a weekly run to Starbucks and you've made up the cost.

if you can't afford the gas, you can't afford your car.

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'nuff said.

in before the lock :paddle:

Alabama doesn't care about the environment. 93 octane and some stations with no ethanol.

That's what my Evo currently drinks so this won't be a problem. Glad I could actually find this topic though so I didn't have to create one!

Unless the ECU advances timing until pinging occurs than 91 will work best as the car is tuned for 91. If it's retuned for more, then run more. Or if the ECU is smart and advances until ping then run more, but otherwise you won't see any benefits.

when you guys say 91, do you mean "91 RON" or "91 AKI" ?

AKI, at least that's what I was talking about.

Exactly. No sense in running higher octane if ECU is not tuned for it.

20 cents more a gallon for premium is hardly anything. Think about it; lets just say that you average 25 mpg in your FRS/BRZ. If you drive 25,000 miles a year (easy math) then thats 1,000 gallons of gas a year.

That means you are only spending $200 a year for the premium fuel when compared to if the car had run on regular. Thats hardly anything; its $3.84 a week.

I don't understand why people get so weird about money when it comes to gas. Paying 20 cents more per gallon to get more effeciency out of an engine seems unreasonable to people. People will drive out of their way to get to the cheapest gas station if it will save them 3 cents a gallon on gas. Its madness. :iono:

I don't want to see how many duplicates of this topic we have. :( :search:

AKI is US octane so this comes up a lot.

Interesting fact, Iowa (think corn state), also offers Ethanol free Gasoline next to 10% Ethanol infused Gasoline and many times E85. :mad0260:

I might be cheap about many things but fuel is not something I like to cheap out on. New Engines aren't cheap and they run better with the best minimum octane anyway. :bonk:

Use whatever fuel they tell you to.. Anything more and it's pointless, unless the timing is self advanced absolutely untill knock

Could you be any more ignorant? The octane rating has nothing to do with hurting the environment. And ethanol production has been shown to be harmful to the environment, nevermind that ethanol contains less energy than gasoline and thus reduces the fuel mileage of vehicles. The ONLY benefit to ethanol being added to fuel is to (barely) reduce the US's dependence on foreign oil.

Think before you post:bonk:

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i wonder why can't they make ecu to adjust whatever octane we want to use...

this car will be daily driver. don't need to spend almost $4 a gallon everyday...:thumbdown:

because thats not how it works.. look up how it works, then come back and explain how it is possible to use ANY octane rated fuel, without loosing power/efficiency

I'm upset that they can't design a engine that will run on regular, diesel and/or hamster pee. Very frustrating.

In all seriousness, this car is tuned for performance. If you want a car for fuel economy there are many other options. The cost of premium fuel over a year is negligible especially if this pulls over 30mpg hwy.

I still want more than 30mpg Highway.

Maybe I should just buy a prius for school. And be a baller when I go to work and the grocery store. Lol

Edit: Or.. that new Mazda CX-5.

I wouldn't worry about that. My S2000 tops 30mpg on the highway quite regularly. This car should get 34-35mpg on the highway easily.

I'm a little skeptical if premium fuel (91-93) will improve mpg, but octanes above 93 definitely won't help (nor are cost effective). I'm waiting on the EPA ratings but it this thing can get 35 highway, I will be very pleased!

You'll also have more money in your pocket if you buy a cheaper car.

i think hes referring to the fact that the compression ratio is so high. there are a lot of things an ecu can fix but cr isnt one of them