Mixing Premium and Ethanol?

[Old Snipe]

With all the talk about how 10% ethanol mixed gas brings down your mileage, could filling you tank first with plus or premium, then at 1/2 tank topping off with the ethanol blend, would that help to increase the miles per gallon over straight eth. blend?

Best Regards!

[Old Snipe]

With all the talk about how 10% ethanol mixed gas brings down your mileage, could filling you tank first with plus or premium, then at 1/2 tank topping off with the ethanol blend, would that help to increase the miles per gallon over straight eth. blend?

Best Regards!

[Petro]

Old Snipe;
By the time you pay the difference for the premium gas you may lose more $$ than what is lost by ethanol. I have been using 10% ethanol in my unit since last fall. I keep fuel records and I can't truthfully tell you that I lost or gained mpg. Wind and road conditions always factor in. I average about 6.5 when I tow my Buick and about 7.5 when I don't. It does not seem to make any noticeable difference.

Don

[Tom N]

Higher octane gas does not increase mileage.

[DriVer]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Tom N:
Higher octane gas does not increase mileage. </div></BLOCKQUOTE>I resemble that remark.

[Steady Eddie]

Ethanol contains less heat energy per gallon.

[CharlieM]

May sound strange, since you pay more for it, higher octane does not mean that it is "better" fuel. The additive for octane rating is more a measure of burn time for the fuel. Higher octane equates to slower burn. The reason you get a knock with lower octane is the fuel detonates prematurely or too quickly. I am not familiar enough with the ethanol properties to know how it compares.

I have operated equipment with an electronic fuel control that would automatically adjust for the type of fuel used. You could basically burn anything that would go down a pipe and burn. Fuels that were proven acceptable; gasoline, diesel, JP4, JP8 (Jet Fuel). The ability to design flex-fuel engines has been around since the late 50's just not cost effective to produce.

[Steady Eddie]

Ethanol absorbs water.

[Bigdaddy]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Steady Eddie:

Ethanol absorbs water. </div></BLOCKQUOTE>So thats why my ice cubes dont last!

[CharlieM]

Can't remember exactly but I think that it can absorb 50% of its volume in water before separation occurs. Ethyl, Isopropyl and Methyl will all work, Methyl is the most corrosive. Isopropyl/Rubbing Alcohol is already 30% water so it isn't useful as an absorbant.

Just rambling through old memory banks.

[Steady Eddie]

Originally posted by Bigdaddy:
"So thats why my ice cubes dont last!"

Ethanol attacks rubber.

[bsinmich]

While the MH may handle the Gasohol the directions with my generator state to "NOT" use gasohol. Since I only have 1 fuel tank (thank goodness) I guess the choice is made for me. My experience with cars is that mileage will drop somewhat. My 2000 Grand Caravan is flexfuel but no one sells it around here.

[DriVer]

i just saw last Friday on the CBS Evening News where the state of Minnesota has over 200 FFV E-85 filling stations.

I learn stuff every day. Here I though that E-85 meant 85 Octaine equivalent when that's not true. It actually means 85% Ethanol content. Now that's a horse of a different color.

[Tom N]

Start thinking about 5 mpg if you could burn E85 in a motorhome.