Ethanol Free 93 octane gasoline

[24TremorXLT]

Another amusing thread brought to you by the forum experts

Bro im reading this in 2026 just dying. 70% of this forum is a joke. So thankful for the ones that actually take time to post quality information with sources.

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[710-oil-614]

Bro im reading this in 2026 just dying. 70% of this forum is a joke. So thankful for the ones that actually take time to post quality information with sources.

70% of forums are a joke. It’s not an MTC issue.

 

[24TremorXLT]

70% of forums are a joke. It’s not an MTC issue.

Couldnt agree more

 

[Suzukiridr14]

My 2024 Ecoboost runs the same on regular and premium. I see a small average mpg gain, say 2 or 3 % with premium and that’s a maybe.
No noticeable power difference but I don’t drive it in the upper third of the power band, ever.
I never go over 5,000 rpm.
Except for the time I forgot I had it in low. I hit 5,400 before I noticed it.
:’P

Any way, for chits and giggles I put on a fuel load of what I like to call
Real Gasoline.
NON Ethanol 93 octane.

My Mav is just bit different.

I’m not going to say how. I’m looking for other peoples input, thoughts, opinions and results.

I paid $3.54 a gallon.
My regular is running $2.64
And my Ethanol premium is $3.39 a gallon.

Penny for your thoughts ?

I use NON Ethanol gas in my 1956 Thunderbird, I'm a classic car guy so I always use it in older cars because it doesn't affect the gaskets, and seals they have. The biggest downside is the price. Also those older cars get terrible mileage! But the great memories are worth the price.

 

[racerzz]

This comes up endlessly on forums. Much confusion. First there is confusion as to what preignition and detonation are. I believe the myth of higher octane providing more power is purely by its only energy content is understood by most as being false, here is why.

Preignition-is when combustion starts before the spark plug fires, this can be due to a number of factures including a hot exhaust valve, glowing carbon deposits or an overheated spark plug electrode, This is very destructive and should be avoided. Yes, higher octane fuel is one way to combat preignition, but it is not how octane rating is derived.

Detonation or knock - this occurs after normal combustion starts - plug fires, flame front is established, pressure rises as flame front expands toward the perimeter of the combustion chamber. At this time a spontaneous second ignition occurs outboard of the primary/timed ignition. This second high-speed high-pressure flame front collides with the original flame front resulting in a very high and destructive pressure spike. This pressure spike also scrubs away the protective boundary layer protecting the top of the piston - very destructive.

 

[racerzz]

There have been many advances which drive detonation ever higher in the performance envelope. Years ago to compression was the norm, now we have engines running 10 or even 12 to 1 compression on 87 octane pump gas. The younger crowd will attribute this to electronic engine management which certainly helps but the escalation of compression ratios and performance started decades before electronic intervention. Consider four valve heads, most intuitively understand increased flow but do they understand the other major performance enhancement? Swirl or tumble, this is critical to high performance. combustion chamber design, modern combustion chambers are roughly lenticular with centrally located spark plugs. Flame travel is now uniform. The knock sensor is a reactive component, yes, it will prevent knock but not because the basic design prevents it. Four valves, port design, combustion chamber shape, these are all preemptive allowing high performance and efficiency. The knock sensor is reactive and ends the party when basic engine design or insufficient fuel octane allows knock to occure.

 

[racerzz]

Octane rating. octane rating is simply a fuels resistance to knock, nothing to do with how much energy the fuel contains. Lab techs. take an engine with variable compression, incrementally increase compression with a given fuel until detonation/knock occurs and can then assign the anti knock/octane rating.

 

[racerzz]

Finally, and this truly sucks, any non-instrumented non laboratory tests we might perform are largely useless. I speak from long experience, worked at several gas stations, dad had a gas station repair shop business. This could be another entire thread but I will ask you to trust me on this one, you have no way of knowing what is actually coming out of that dispenser. I NEVER trust that I am getting the octane or ethanol content listed. One example of many just to highlight a point. Some aircraft have an STC for auto fuel and all homebuilt experiential aircraft have nonregulated options, but all pilots understand the different operating requirements for aviation fuels so we test at the pump for ethanol. A local pilot, highly experienced and knowledgeable, machinist by trade tested 25 percent ethanol at a local station. Ethanol as it is highly corrosive is only added by the distributor. How did this happen? lots of possibilities. Also the very purchase requirements for gas stations can force them to dilute their high octane fuel. Read an article last week that a major us cities gas stations failed quality test by 96 percent.

 

[kevinmccune]

Gas has higher energy per volume than ethanol so your fuel economy should be a bit better

correct,a bit,ethanol has a btu content when its 10% of the blend you are hard pressed to see the difference,now their are other advantages to running non ethanol,particularly if your vehicle or implement sits a lot. If you leave e10 in a gas tank long enough its hard to get the vehicle started not to mention the gunk.

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