Non-Ethanol vs. E10

[mikz86ta]

Curious if anyone has done any testing of a tank full between the two?
And does the 5.7 Hemi with 2014 PCM have a fuel sensor to detect which fuel is being used?

On my 2003 s10, it was set for a non-eth AFR factory and no sensor. I saw a mpg drop once the stations swapped to e10. Even with my EFIlive tuner, changing the target AFR to match what e10 is, I still got no better milage.
I can still get non-ethanol at some places. Wanted to test it out but would definately like input.

I get avg mpg between 18-19 on the stock info center. Saw just over 20 on a trip.
Best my 4.3 was getting........with mods (no cam or heads)......was 17.9 during the e10 gas and AFR adjustment

 

[mikz86ta]

Ok so I started Friday using Non-Ethanol 89 in the Ram. On the weekends previously and after a week of my daily commute, I would see a best of avg around 18.6mpg according to the trucks dash display. Drop to 17.8 if I had to be around town in idle and lots of redlights. Best of 19.2 when doing more hwy cruising

At the end of the weekend with Non-Ethanol Midgrade, I had a best of 20.1mpg. In a mix of town and
highway the same as I always have, I was steady at 19.6/19.8 for the majority of the time. The lowest I got was 18.9 in town stuck in traffic and lights. The 20.0 came near home Sunday eve and 20.1 on my way to work.

I didnt change my driving habits a bit. Letting MDS kick in. Some fun-pedal blast. And normal driving.

I run 89 e10 normally for reference.

 

[jbr]

Ok so I started Friday using Non-Ethanol 89 in the Ram. On the weekends previously and after a week of my daily commute, I would see a best of avg around 18.6mpg according to the trucks dash display. Drop to 17.8 if I had to be around town in idle and lots of redlights. Best of 19.2 when doing more hwy cruising

At the end of the weekend with Non-Ethanol Midgrade, I had a best of 20.1mpg. In a mix of town and
highway the same as I always have, I was steady at 19.6/19.8 for the majority of the time. The lowest I got was 18.9 in town stuck in traffic and lights. The 20.0 came near home Sunday eve and 20.1 on my way to work.

I didnt change my driving habits a bit. Letting MDS kick in. Some fun-pedal blast. And normal driving.

I run 89 e10 normally for reference.

With all factors being the same non-ethanol gas will yield better mpg and performance for the most part. I have no comparison numbers personally because all gas here is at least 10% ethanol mix

The same as summer vs. winter blend gas. My last fill up and with colder temperatures has sent my mpg down to 11-12 mpg on the EVIC. I will lose 2-3 mpg from November until April with winter blend fuel. Winter blend sucks!!

 

[charonblk07]

The only way for your engine to know what fuel is being used is from the knock sensors, there is no fuel-type sensor

Typically you see a ~20% difference in MPG between E10 and pure gasoline, as for performance, it depends on what you have done to your engine. I personally want to run a higher ethanol content because of the higher detonation resistance so if you have a higher compression, run nitrous, or are boosted then ethanol is a good thing, for most N/A engines it won't make a difference unless you advance the ignition timing further and increase the injector pulse width to account for the higher fuel requirement of an ethanol blend.

 

[mikz86ta]

Thx charonblk07. I was curious abt the sensor.

The price of 87 non ethanol here I found was 3.09 here.
89 non ethanol I used cost me 3.79 at a shell. Which was the price I was paying for e10 89 a month ago before the price drop.
Right now 89 e10 is lower 3 dollar range.

So cost vs. mpg?? Not sure yet

 

[rowdyram]

Ethanol yields a 34.26 drop in volatility compared to pure gasoline so vehicles with ethanol sensor increase fuel trims accordingly and result in a milage drop. Vehicles without ETH sensors can loose up to 8% power over gasoline. Ethanol is also hygroscopic so draws excessive moisture into your fuel causing even more power loss. Ethanol can retain 100% water so 10% ETH can capture 10% water. No matter how you look at ETH is no good

 

[charonblk07]

Ethanol yields a 34.26 drop in volatility compared to pure gasoline so vehicles with ethanol sensor increase fuel trims accordingly and result in a milage drop. Vehicles without ETH sensors can loose up to 8% power over gasoline. Ethanol is also hygroscopic so draws excessive moisture into your fuel causing even more power loss. Ethanol can retain 100% water so 10% ETH can capture 10% water. No matter how you look at ETH is no good

Except in the cases I mentioned above where the detonation resistance outweighs the consumption increase. In my truck I always run 94 e10 because of the increased detonation resistance, if e85 was available in Canada then I would be running that instead. There's a reason that a lot of the street/strip cars are changing over to e85 instead of running high octane race fuel.

 

[Dubstep Shep]

Ethanol will almost always make more power than gasoline, even with nothing more than a stoichiometric adjustment. Throw a little extra timing in and you can make even more. 10% hp gains aren't unusual switching from 93 to e85.