Gas Premium or regular?

[TaddyDobbins]

I purchase all of my gas, all of one tank, from a new Shell station down the road and always fill up with 93 octane. For me a gas station with clean tanks and filters is the way to go. All of the ethanol free stations around me do not carry 93 and are extremely dirty and run down.

The dealership I purchased it from filled me up with ethanol free 87 octane from a service station they have a contract and it ran poorly compared to the 93. My FR-S is much happier. Now I just have to get through the 1,000 mile break in. Ugh, 600 miles to go.

[Carbon420]

This brought up an interesting point for me personal ally. Some one said that the car want 93 not 91 and 91 is the premium availible here In Calgary. I know of one station way south that has 94 but that's all other than the 91 regular premium.


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[ravenblackfrs]

I don't know what kind of difference it would make, but I agree with most of the post I've read about "why chance it messing up your car".... I wouldnt take the chance, its even at $.30 difference. Thats only $3 difference. I could see if it was saving you $10 or $20... but 3 bucks. No deal.

Also, put 87 octane in a motorcycle... you wont make it far.... if not tear the engine up. Knew a guy with a gixxer 750 and put 87 in once by accident, had to take it to the dealership to get if fixed. Bike wouldn't even run. Not saying this will happen to every bike, or even the FRS/BRZ...

[fistpoint]

Originally Posted by moniz

Premium is required, but it will run on 87, as will all cars that require premium, if it HAS TO, like in an emerg situation, like if you in the middle of a nowhere gas stop and all they have is 87. The computer will adjust the timing to accommodate the 87, but, BUT, it will run like crap, have less power and get WORSE mileage. The money you think you're saving by putting in 87 gets eaten up right away in getting less per mile so you're not saving a damn thing and potentially costing yourself more in the long run if you run 87 regularly.

If putting 91 or higher is a problem for people, them why even but the damn car? These kind of people remind me of the old quote "...those that know the price of everything, and the value of nothing."

I'd like to point out that the reverse is also true. If the manual says regular unleaded, you might lose power and mileage by using premium in its place.

Use what the manual says, period.

[Chad]

Originally Posted by fistpoint

I'd like to point out that the reverse is also true. If the manual says regular unleaded, you might lose power and mileage by using premium in its place.

Use what the manual says, period.

Very good point to mention. Gas stations can sometimes push premium on people who have cars that aren't supposed to run premium and in turn are not setup to use premium efficiently. Some gas stations try to promote premium gas as being "cleaner" or have "engine cleaning additives" which are also bullshit.

GO BY THE MANUAL!

[LeeMaster]

Originally Posted by bimmerboy

91 or higher only.

My manual says 93 or higher towards the last few pages.

[shishand]

just bored.

[jmaryt]

ehe! he! he! gut some growin' and learnin' to do!
he's happy! leave him be! plays a mean flute though!

[Allch Chcar]

Originally Posted by fistpoint

I'd like to point out that the reverse is also true. If the manual says regular unleaded, you might lose power and mileage by using premium in its place.

Infact on some newer economy engines it can improve power and fuel economy.

For example, the new Focus GDI engine will make a few more HP on premium but it's also 12:1 static compression ratio(SCR). I have a suspicion that the Mazda3 does the same thing being the same SCR. Interesting fact, Mazda redesigned the skyactiv engine to use regular octane just for North America.

Hondas have adjusted for higher octane for a number of years. At least as far back as the Fit. IIRC they can effectively use up to 100 RON, which is about 94-95 AKI.

But yeah, manual recommends 93 aki. 91 aki is required. We might need to sticky the page out of the manual to discourage these posts.

[Chad]

Originally Posted by LeeMaster

My manual says 93 or higher towards the last few pages.

I noticed that too.... unfortunately where I live it's nearly impossible to find 93... I think the most important thing is the 0% ethanol.

[LeeMaster]

Originally Posted by Allch Chcar

But yeah, manual recommends 93 aki. 91 aki is required. We might need to sticky the page out of the manual to discourage these posts.

So I use 93, but I require 91? You try to confuse. lol jk its been a long night, byebye

[Apoc]

Originally Posted by Carbon420

This brought up an interesting point for me personal ally. Some one said that the car want 93 not 91 and 91 is the premium availible here In Calgary. I know of one station way south that has 94 but that's all other than the 91 regular premium.


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You need to look harder for 94 in Calgary. Dozens of Petro Canada stations have 94 octane (with ethanol) and many more Husky stations.

http://www.myhusky.ca/station_locato...cityID=Calgary
http://retail.petro-canada.ca/en/ind...PC=+&R=50&B=UL

[Allch Chcar]

Originally Posted by Chad

... I think the most important thing is the 0% ethanol.

Dude, Ethanol is high octane...and you don't have to worry about Ethanol with this car. Now if you find a station selling bad gas, that's a different story.

Originally Posted by LeeMaster

So I use 93, but I require 91? You try to confuse. lol jk its been a long night, byebye

Sorry about that. When I say required, I mean least common denominator. It's a math thing.

[fistpoint]

Originally Posted by Allch Chcar

Infact on some newer economy engines it can improve power and fuel economy.

For example, the new Focus GDI engine will make a few more HP on premium but it's also 12:1 static compression ratio(SCR). I have a suspicion that the Mazda3 does the same thing being the same SCR. Interesting fact, Mazda redesigned the skyactiv engine to use regular octane just for North America.

It isn't bullshit, you just found a few examples that don't fit the mold. The vast majority of engines don't apply to your exceptions though.