Fuel Question

[Johnny maverick]

Fuel looses octane over time. So if it sits a lot like mine is run the highest quality and octane no matter the cost. I put 1000 miles this year. On my daily which is an baby ecoboost 93 is a must. Totally noticeable in power and economy.

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[Garfy]

Did you bolt a supercharger on there also when you went from 87 to 93? 1.1 second decrease in 0 to 60 is a lot, like 200 more horsepower a lot.

Doug

No I didn't. However, some of it could be due to the engine loosening up a bit. It was done with the car having just under 2000 miles on it.

 

[Millarduck]

Please explain how it's "designed for 87". What, exactly, makes the Coyote engine "designed for 87"? Pistons? Rods? Intake? Engine mounts? ECM?

Ford Motor company designed it for 87, per their owner's manual. As it says, in the summer you will get a bit better performance moving up in octane to 91 or higher. If your car is a daily driver, 87 is fine. The level of detergent is no more between premium and regular. For example, Exxon gas in your area very likely could be from a non-Exxon refinery, it becomes Exxon (or Shell) when their unique detergent is added at the tanker rack. All gas is made to meet EPA detergent standards, but TopTier exceeds those standards and gets auto manufacturers' (like Ford here) recommendations. https://www.toptiergas.com/

 

[Qcman17]

I run 91 in mine and don't go higher as the car is traction limited more than anything.

 

[KingKona]

Ford Motor company designed it for 87....

That's stating that 87 octane is the MINIUM octane that can be put in the tank. It goes on to say what can happen to the car and it's warranty if sub-87 octane fuel is used. It then goes on to say that if you want the best vehicle and engine performance out of the engine, you need to run 91 or higher octane.

It does not, in any way, shape or form, say it was designed for 87 octane. In fact it's basically saying that the engine was designed to run best on 91+ octane.

Reading comprehension is important.

 

[engineermike]

Technically, even 93 isn’t enough octane to extract maximum hp out of a gen3 coyote. I believe around 96 is what it would take to get there.

 

[young at heart]

Technically, even 93 isn’t enough octane to extract maximum hp out of a gen3 coyote. I believe around 96 is what it would take to get there.

So, would it be overkill (or even detrimental) to use some kind of an additive or octane booster along with 93?

At face value it would sound like a cheap-ish hop up.

 

[engineermike]

So, would it be overkill (or even detrimental) to use some kind of an additive or octane booster along with 93?

At face value it would sound like a cheap-ish hop up.

Yes, you can add some Boostane or torco and it will help. Not all octane boosters are the same though. In hindsite I think I would add 2-3 gallons of e85 every fillup if it’s available. It’s cheaper, very effective, doesn’t stain the plugs/sensors, and potentially more convenient.

 

[young at heart]

Yes, you can add some Boostane or torco and it will help. Not all octane boosters are the same though. In hindsite I think I would add 2-3 gallons of e85 every fillup if it’s available. It’s cheaper, very effective, doesn’t stain the plugs/sensors, and potentially more convenient.

Would this help power boost even a non-tuned car?

 

[engineermike]

Would this help power boost even a non-tuned car?

Yes. Fuel trims will be a little high but not high enough to set a code. Knock advance will give you the timing to take advantage of it.

 

[geezer stang]

Ford Motor company designed it for 87, per their owner's manual. As it says, in the summer you will get a bit better performance moving up in octane to 91 or higher. If your car is a daily driver, 87 is fine. The level of detergent is no more between premium and regular. For example, Exxon gas in your area very likely could be from a non-Exxon refinery, it becomes Exxon (or Shell) when their unique detergent is added at the tanker rack. All gas is made to meet EPA detergent standards, but TopTier exceeds those standards and gets auto manufacturers' (like Ford here) recommendations. https://www.toptiergas.com/

i worked on tank barges for a major oil company(175,000 bbl capacity)we loaded and discharged "base stock" gasolene at different terminals that was tested for "odor,color,reid vapor pressure,water content and octane,to be deliverd or loaded to other major oil companies..."propritary formulas and grades are mixed at the "tanker truck rack" for delivery to certain stations,with that said,i only use "top tier 87 octane" im my base 21 gt,but i understand the benifits of the 91/93 octane.

 

[PoCoBob]

Before I retired I was a sales rep travelling through British Columbia. I was using my 2011 Mustang with a 3.7 engine as my car. Monthly I would do one trip that took me through the mountains several times. I always used 87 and I always reset the trip meter before I left. That trip covered a few days and about 1500 kms. One time I decided to run 91 the entire trip (about 3 tanks) and at the end of the trip the car averaged just over 10% better fuel ecomony. The cost for 91 was about 20% more so about half the cost difference was made up in fuel economy. So when comparing prices at the pump the difference may not be a big as just looking at price.

 

[Doug V]

That's stating that 87 octane is the MINIUM octane that can be put in the tank. It goes on to say what can happen to the car and it's warranty if sub-87 octane fuel is used. It then goes on to say that if you want the best vehicle and engine performance out of the engine, you need to run 91 or higher octane.

It does not, in any way, shape or form, say it was designed for 87 octane. In fact it's basically saying that the engine was designed to run best on 91+ octane.

Reading comprehension is important.

Octane itself does not make horsepower. But when lower octane fuel is used, the computers will retard the timing to reduce detonation. Performance will be compromised as a result. Since the Coyote engine has such high compression, I would be more concerned with possible damage from knock and detonation. That is why the warranty thing becomes an issue.

I may have posted this on accidentally on another thread, but try adding a bottle of 104+ octane boost. You will see the difference, within a few minutes, that octane will make on the computers ability to make timing adjustments. This probably will not affect those with modified tunes.

 

[engineermike]

104+ isn’t a good one. There are only 3 I’m aware of that actually help a measurable amount: torco, Boostane, and nos brand. They all use the same effective ingredient and can boost you well over 100 depending on mix ratio.

 

[KingKona]

Octane itself does not make horsepower. But when lower octane fuel is used, the computers will retard the timing to reduce detonation. Performance will be compromised as a result. Since the Coyote engine has such high compression, I would be more concerned with possible damage from knock and detonation. That is why the warranty thing becomes an issue.

I may have posted this on accidentally on another thread, but try adding a bottle of 104+ octane boost. You will see the difference, within a few minutes, that octane will make on the computers ability to make timing adjustments. This probably will not affect those with modified tunes.

You do realize all of us are Mustang/Coyote enthusiasts that are very aware of everything you're posting, right?

There is nothing you know that hasn't been talked about here, ad nauseam, in thread after thread. Please don't try to explain basics to people.

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