How much power do those turbo bois make when you put in 2.5 gallons of E85 and run 95 octane fuel????

 

the ECU would not make any changes for that octane value at or close to 100 octane .I would be the same if all condition allows at the highest rated power output claimed by the oe and at which octane values and type of fuel used. A misconception many have about fuel, octane of fuel supports the power but itself does not make power. The ECU was never programed from MAZDA for E85 unless stated.

In your example should you feel or if DYNO see an improvement than you had a problem before introducing the higher octane values above 93/95 either at the pump or a mixed formula..
Also reading and understanding how the supplier arrived at the gasoline octane is very important to the engine output levels. Not all number values are derived the same way. Another misconception commonly seen expressed on the internet.

To be sure you need the exact information of the gasoline formula as well doing a specific gravity test of the fuel before testing or racing.
Naturally these day you should do a before and after DATA logging of the primary fueling and ignition area's of the ECU.

 

Just a warning for all you theorist E85 has directly shown to damage your CAT. While there or some that suggest other wise remember it not their vehicle and not them needing a new CAT by thinking it is safe to use E85 on a continued bassis.
When you see a PO421 don't cry that you read it on a forum that members were using it and postings with no problems.

Good reading to think about:

Car Repair Advice Forum= at your own risk - Mazda Forum - Mazda Enthusiast Forums

 

So what if you live in California and have a turbo skyactiv engine, and you only have access to 91 octane fuel. Wouldn't running a few gallons of E85 bring you up to 93 octane allow you to achieve the max power the factory intended?

 

I am not questioning whether or not E85 Hurts Catalytic converters, but do you know how it does it?
Do you know the exact route it causes problems?
I seem to get conflicting info while researching the topic.

I found this one article about it:

Ethanol and ZDDP

Your engine's cylinders never achieve an airtight seal; at best, they'll always allow at least 1 percent of the combustion gases to escape past the rings and into the crankcase, where the oil is. The problem with ethanol is that it's highly reactive with phosphorous, combining with it to produce any one of several free-floating phosphor compounds. These compounds get sucked up through your positive crankcase ventilation system, sent through the motor and then make it to the catalytic converter. Once that happens, you're looking at converter poisoning not directly as a result of the ethanol, but the way that it interacts with the phosphorus in your oil.

https://itstillruns.com/effects-etha...-12172217.html

 

This how it does it:
Ethanol has a lower heat value than regular gasoline which will reduce your MPG (even in 10% blends).
It also means ethanol blended fuels start harder in colder climates.
Many assume that Ethanol's 30 percent energy deficit over regular gasoline, means a 30 percent richer air-fuel ratio.
That translates to more unburned fuel flowing through the cat; and that supposedly produces more heat, which kills the cat.
While the first part is true, the richer air-fuel ratio won't affect converter temperature any more than it will combustion chamber temperature, meaning not much.
Energy content is energy content, regardless of whether it's spent in the combustion chamber or catalytic converter.
In 1996 (USA) the EPA made the OBD-II cat mandatory in all new vehicles. That same year the allowable ZDDP content in standard engine oil was dropped from 1,600 parts per million to 800, and to 400 in 2004.
The Fed reduced ZDDP levels because the same properties that allow ZDDP to penetrate the metal in valve train components also make it deadly to catalytic converters.
If these metals absorb into your converter wash-coat, they'll coat the precious metals and render your converter useless.
Engine cylinders never achieve an airtight seal, at best they always allow at least 1 percent of the combustion gases to escape past the rings and into the crankcase, where the oil is.
The problem with ethanol is that it's highly reactive with phosphorous, combining with it to produce any one of several free-floating phosphor compounds.
These compounds get sucked up through your positive crankcase ventilation system, sent through the motor and then make it to the catalytic converter. Once that happens, you're looking at converter poisoning not directly as a result of the ethanol, but the way that it interacts with the phosphorus in your oil.
In other words, you better be choosing the right oil (ZDDP content) if you are using high ethanol blends, or you will be prematurely depleting the life of your cat.

 

Interesting Mazda manual saying the mazda 3 can run E85 in Thailand:

https://owners-manual.mazda.com/gen/.../04040101.html

 

In warm climates you can run as much ethanol as you want in flex/fuel vehicle.
In Brazil they run E100.
The only mixed fuel I ever ran was in my hydroplane and while it did give me more speed it gave me far more mechanical headaches and monetary issues.
I personally don't like ethanol.
My/our tax dollars pay the subsidies to grow it, then we pay more in tax dollars to buy it.
Not to mention when it first came out in my state it ruined two of my expensive outboard engines.
Ate the fuel lines in my motorcycles causing a cascade of other issues.
If I could find a way to remove the 10% ethanol blend that I'm forced to purchase, you can have it

 

Some pretty good information to add a couple things

In some countries Mazda may state you can use alternative fuels.. but the warranty claims denial in those countries is some of the highest anywhere. That is just not MAZDA either.

Lobstah I have never understood why that statement I read often in the Tech periodicals about 1% blowby in grouping all gasoline engines? I Have personally built engines that had 0% blowby to the crankcase. Its not that difficult to achieve by a specific hone in the cylinders and a never used (to the best of my knowledge) ring con bination and type and also a piston machining modification.
And while I can confirm but have a couple of customers that live in Thailand, catalytic converters required and when they failed are often simply removed and not replaced.

Here is 1 of the machining tools used to achieve a total seal combustion chamber!

But then after all I am a "CRAFTSMAN" in my trade lol




I wonder how long before in the USA before Craftsman Tools will have to change their name?

 

E85 THAILAND
Here is a screenshot from the mazda website on skyactive running E85 in Thailand, just in case the link I put in the post does not work.