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Scion FR-S / Toyota 86 GT86 General Forum The place to start for the Scion FR-S / Toyota 86 | GT86


View Poll Results: Which gas is better?
Shell 50 44.64%
Chevron with Techron 27 24.11%
Mobil/Exxon 5 4.46%
BP 5 4.46%
other. please state. 25 22.32%
Voters: 112. You may not vote on this poll

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Old 12-13-2018, 11:04 AM   #57
Victorscp
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Originally Posted by PetrolioBenzina View Post
Nope, you know exactly where the noise is coming from if you have crickets.
damn squeaky ass cabin... its brand new i cant find that noise and its annoying lol
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Old 12-13-2018, 12:18 PM   #58
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damn squeaky ass cabin... its brand new i cant find that noise and its annoying lol
The good news is that after 100,000 or so miles everything wears into place and all the squeaks go away.
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Old 12-13-2018, 12:22 PM   #59
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The good news is that after 100,000 or so miles everything wears into place and all the squeaks go away.

Are you sure? I figure you just learn to ignore them.
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Old 12-13-2018, 12:33 PM   #60
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Are you sure? I figure you just learn to ignore them.
That was the interim solution yes but I only get any real noises now when it hits about -10 out and pretty much any car made makes noises at that point.
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Old 12-18-2018, 07:41 PM   #61
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Has anyone run both 93 and 91 and noticed any difference?
Not being able to run anything above 91, I'm curious to see how much (if any) performance I'm losing since the manual specifies 93.
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Old 12-19-2018, 05:34 AM   #62
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These are mass produced engines that aren't really anything special... any decent gas station where the gas doesn't sit for months should be fine.
12.5:1 compression ratio... so yeah, gas does actually make a difference.

It really depends on your area. If you go to a low volume crappy station that isn't maintained well but carries the best brand of gas it won't matter- it'll be crap. In Tampa, in my area at least, the best stations are Shell and there's one Citgo too. The are high volume, well maintained and carry 93 (I never see 91 in this area, but 93 is common).

Remember, if they don't take care of the facilities above ground, they probably aren't taking care of the tanks below ground.
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Old 12-19-2018, 06:19 AM   #63
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Has anyone run both 93 and 91 and noticed any difference?
Not being able to run anything above 91, I'm curious to see how much (if any) performance I'm losing since the manual specifies 93.
93 vs 91 has difference, atleast thats how i feel when i had 94 in it when it was stock. But how long the gas been sitting matters too.

It just feel more smooth reving it out.

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Old 12-19-2018, 08:07 AM   #64
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The good news is that after 100,000 or so miles everything wears into place and all the squeaks go away.
Haha yeah, my car is quieter than it used to be too. Not squeak free but certainly bearable. We have more expensive cars that are worse.
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Old 12-19-2018, 08:29 AM   #65
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Has anyone run both 93 and 91 and noticed any difference?
Not being able to run anything above 91, I'm curious to see how much (if any) performance I'm losing since the manual specifies 93.
It is noticable but it isn't a night and day difference.

When I made the switch to 94, the engine felt smoother to rev out and the occasional knocks went away.
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Old 12-19-2018, 10:49 AM   #66
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Has anyone run both 93 and 91 and noticed any difference?
Not being able to run anything above 91, I'm curious to see how much (if any) performance I'm losing since the manual specifies 93.
There is a bit of a difference but it isn't huge. You will not notice any change at all when you first switch because it takes time and miles for the ECU to learn the change in the engine and advance the timing a bit. This gradual change also means that the difference is blurred a bit because the improvement is incremental not direct. Anybody that thinks they feel an immediate change when changing from one octane level to another are simply experiencing confirmation bias since the ECU has not made adjustments yet.
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Old 12-21-2018, 10:41 PM   #67
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I have to drive 80 miles to buy anything more than 91 octane. If I do so, I can fill my tank with 93 octane but then I have to drive 80 miles home on boring Interstate and waste about 2 1/2 gallons of 93 octane fun. That and if there was an appreciable amount of 91 octane left in the tank the mixture doesn't really hit 93 octane anyway.

BUT, the same station that has the 93 octane also sells 102 octane. Instead of buying 93, I bring a 5 gallon gas can and fill it with 102 octane and head home. Now, when the time comes to have some fun, I put 2 1/2 gallons of 102 in the tank and top it off with 91 which results in a solid 93+ octane tank.

Yes, it takes a few miles for the ECU to realize what happened but there is a definite difference. And I can get two tanks of 93+ using my 5 gallons of 102.

Here is a handy site for finding 93 octane and calculating mixtures:

https://find93.com/

Last edited by LimitedSlip; 12-21-2018 at 11:28 PM.
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Old 01-08-2019, 06:56 PM   #68
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I normally use Costco 91 gas since its top-tier certified. Based on the previous posts I assume Costco in the states offers 93, I haven't seen 93 at any Costco yet here in Ontario. Where I live in southern Ontario Esso offers 93 and Petro offers 94.

+ 1, Costco 91 (No 93 available in CA)
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Old 01-08-2019, 08:44 PM   #69
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Well since this thread is back up, I tried Sunoco 93 e10 the other day and the difference between it and the one Shell station I keep going to was like night and day. The engine's a little quieter and less rackety than the 93 e10 Shell V-powerwhatever. I actually feel like I'm not wrecking my engine when I bring it above 4K RPMs. It's "quieter" and smoother from idle to all the way to redline.

With the active MPG monitor (probably not 100% accurate but w/e) I can both feel and tell the engine is pulling more weight, and more easily on the same stretch of highway commute. At 5th gear (absurdly tall on the AT) I can use less gas and feel the car accelerate more easily (23.4 mpg under light acceleration), whereas I could be harder on the throttle and not feel like I'm going anywhere with the shell 93 (18.X MPG under light acceleration and still accelerating more slowly than the Sunoco). I swore I even felt a difference almost as soon as I put in fresh gas into the car.

The downside is, I'm hoping I haven't just been putting crap gas in my new car for the past however long I've been using that station. This isn't an indication of Shell as a whole but more likely just that station. It's probably just paranoia about owning babby's first sports car, but I digress.

Lesson learned. Vary the gas stations until you find one the cheapest one that feels just right to you I guess.
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Old 01-12-2019, 06:27 PM   #70
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