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Old 03-24-2016, 03:14 PM   #1
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Premium fuel or regular?

What are people running in their stangs? I'm
Wondering if it's worth putting premium I'm though it doesn't need it. I have a 2008 GT. What are other people doing fuel wise?


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Old 03-24-2016, 03:32 PM   #2
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Shell 91 octane all the time. I never want to fill with the wrong octane for the tune I'm running at that moment.
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Old 03-24-2016, 05:19 PM   #3
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Factory tune? 87 octane. Anything else is wasting money

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Old 03-24-2016, 05:37 PM   #4
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I use at least 91 but I have a different tune for it...before that just 87


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Old 03-24-2016, 05:39 PM   #5
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Factory tune? 87 octane. Anything else is wasting money

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Is it wasting money for any car to use anything more than 87?


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Old 03-24-2016, 05:40 PM   #6
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Is it wasting money for any car to use anything more than 87?


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Some of the newer ecu's can monitor knock better and may not ****** timing with a higher octane. That's about it

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Old 03-24-2016, 05:44 PM   #7
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Some of the newer ecu's can monitor knock better and may not ****** timing with a higher octane. That's about it

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I've been putting 91 on my wife's mdx . Figure it would help with performance as far as mpg and just overall better for the life of her car. On my pickup i put 87


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Old 03-24-2016, 05:48 PM   #8
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Nah...not really. I hypermile one of my cars and the additional cost does not pay back in fuel savings on factory tune.

Edit. I find it funny this site filters re-tard. As in reduce timing

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Old 03-24-2016, 05:50 PM   #9
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Hypermile?!!!!


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Old 03-24-2016, 06:03 PM   #10
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91 and 93. I have both in my town. Or Premium.


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Old 03-25-2016, 12:55 PM   #11
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I have a 07 GT and right on the gas filler cap it says to run premium. That being said, if you re-tune your cpu than you should run whatever you tuned if for. I have 91 and 93 tunes but I run the 93 tune so I use premium.
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Old 03-25-2016, 04:33 PM   #12
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87 octane on my 14 runs like a champ
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Old 03-25-2016, 06:09 PM   #13
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91 in my 98 GT and 93 in 15 GT
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Old 03-26-2016, 11:46 AM   #14
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I have used 87 in my '15 GT and no problems, but I usually use 91-93, assuming the car will run more efficiently. Could be a waste of money as some here have suggested.
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Old 04-24-2017, 07:04 PM   #15
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Premium vs Regular Fuel

I can't seem to find a definitive answer to the question 87 vs 93 octane in a 2013 Coyote. I've read so many sites and everyone has a different opinion. Which is it? Is it better to run Premium in a 5.0 or not? It's very frustrating. I just bought the car and have no mods. I want to run the best for the car because I plan on keeping it for a long time and I want the best performance and the best for the engine long term with no mods. Is there anywhere to find a definite answer?
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Old 04-24-2017, 07:47 PM   #16
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91 as I have a 91 perf tune
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Old 04-24-2017, 08:29 PM   #17
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Quote:
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I can't seem to find a definitive answer to the question 87 vs 93 octane in a 2013 Coyote. I've read so many sites and everyone has a different opinion. Which is it? Is it better to run Premium in a 5.0 or not? It's very frustrating. I just bought the car and have no mods. I want to run the best for the car because I plan on keeping it for a long time and I want the best performance and the best for the engine long term with no mods. Is there anywhere to find a definite answer?
Run what the owners manual and/or gas door/cap says. Unless you are tuned. Anything else is a waste of money as stated.
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Old 04-25-2017, 11:15 PM   #18
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100% what jkeaton said. You need to run what the car is tuned for. A factory tune will specify in the user manual what octane.

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Old 04-27-2017, 01:05 PM   #19
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Premium fuel or regular?

I have only used Shell V-power Nitro 92. With my 92 race tune. I refuse to use any other premium gas. I would like to think it keeps things clean and extends the life of my engine.
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Old 04-27-2017, 01:18 PM   #20
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I have only used Shell V-power Nitro 92. With my 92 race tune. I refuse to use any other premium gas. I would like to think it keeps things clean and extends the life of my engine.
I have never used the Shell V-power Nitro, but I have heard a lot of good feedback on it. I currently only have the factory 87 tune for now.
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Old 05-31-2017, 06:37 PM   #21
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I have never used the Shell V-power Nitro, but I have heard a lot of good feedback on it. I currently only have the factory 87 tune for now.

U should try out the race tune man. It's fun to drive. I'm not made of money but for like 30 cents more per gallon, a funner* car to drive, and knowing im using some of the best gas is definetly worth the money. After a while you get used to the extra money and the cost seems normal.
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Old 05-31-2017, 08:50 PM   #22
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I can't seem to find a definitive answer to the question 87 vs 93 octane in a 2013 Coyote. I've read so many sites and everyone has a different opinion. Which is it? Is it better to run Premium in a 5.0 or not? It's very frustrating. I just bought the car and have no mods. I want to run the best for the car because I plan on keeping it for a long time and I want the best performance and the best for the engine long term with no mods. Is there anywhere to find a definite answer?
The Coyote in the Mustang has adaptive Timing in the ECU, so what ever you run the car will adjust to it. The More Octane the more HP, Heck even the V6 will run 6-8 more HP on the Dyno with Premium in it.
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Old 06-13-2017, 09:45 PM   #23
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Factory tune? 87 octane. Anything else is wasting money

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Well said! Unless you have a different tune, then you're wasting money. Just fill up at a decent big brand name gas stations, Shell, 76, Mobil, etc. Not some small corner gas stop.
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Old 06-14-2017, 06:46 PM   #24
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I can't seem to find a definitive answer to the question 87 vs 93 octane in a 2013 Coyote. I've read so many sites and everyone has a different opinion. Which is it? Is it better to run Premium in a 5.0 or not? It's very frustrating. I just bought the car and have no mods. I want to run the best for the car because I plan on keeping it for a long time and I want the best performance and the best for the engine long term with no mods. Is there anywhere to find a definite answer?
Everything I have seen the difference in HP between 87 and 93 with a stock tune coyote 5.0 is 4HP. That is a number you can not feel with your butt Dyno.

I know with the 13 Focus ST Ford published the power difference between 87 and 93. It was 9HP peak and the peak torque remained the same. I couldn't really feel that difference.
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Old 06-24-2017, 03:21 PM   #25
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You also get more additives, cleaners and things like that in Premium gas
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Old 06-24-2017, 03:32 PM   #26
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That used to be true when most cars had carburetors but not anymore. The additive package from a given manufacture is the same between 87 and 91/93.
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Old 06-26-2017, 11:42 AM   #27
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Shell only offers v-power in 93 octane.

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Old 06-26-2017, 04:20 PM   #28
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A lot of marketing there but is it really any different than the additive package in their 87? Or are they just trying to make you feel better about paying more.

You supposedly get more additives than the government mandates from the Top Tier suppliers too.

Gasoline is a commodity where Mobil sells to shell and Shell sells to BP, etc. And all the gasoline being distributed in an area of the country comes from the same tanks, ie, Shell gas coming from distribution tanks owned by Mobil or what ever brand has distribution tanks in the area. The additive package is added at the time they fill the tanker I wouldn't think Shell would have two.

I buy gas based on the station having high volume. I rather get my gas from an off brand that is turning over their inventory every few days than from a brand name station that fills it's tanks once a month
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