Does it matter whether E10 vs pure gasoline?

[friendly_jacek]

We know that as little as 15% ethanol can be harmful: https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2709877#Post2709877

I would not be surprised if the 10% could also have some subtle long term issues.

The good news is the "up to 10% ethanol" gas is usually much less if any: https://bobistheoilguy.com/forums/ubbthreads.php?ubb=showflat&Number=2622214#Post2622214

 

[SrDriver]

Here we have Two stations that brag about having Ethanol free fuel but both are on the other side of town and charge more for their fuel.

I do fill the lawnmower can a couple of time a year there.

Have found out that keeping tires pumped up (I always check them in the morning before the vehicles are driven every few weeks) and run a couple pounds over the recommended amount. On a trip with a lot of highway driving I run 5 pounds over the recommend amount.

Driving a bit slower helps too and more than makes up for the Ethanol in the fuel in my opinion for what it is worth.

 

[ag_ghost]

Originally Posted By: Danh
Originally Posted By: ag_ghost
I carefully measured mileage last year on a cross-country trip and achieved at least a 10% improvement in mileage with 100% gasoline, never mind the arguments about gasket life.


So the 10% ethanol in E10 has no energy content at all? You'd get as far with 9 gallons of gasoline as with 9 gallons of gas + 1 gallon of ethanol? In a car engineered for E10?

16.5 MPG (including into in strong headwind) with 91 octane 100% gasoline.

15 mpg on 91 octane in Iowa; less headwind.

(16.5 - 15) / 15 = 10%

I did not claim the car was engineered for E10. It was the '63 Ford in my signature.
Kevin

 

[SteveSRT8]

Every truck in our fleet loses mileage with ethanol fuel. Some are more than 10%.

 

[UG_Passat]

ethanol is a great engine cleaner and octane booster....

but... very hydroscopic... so volume at a gas station is critical. THe higher volume at the gas station, the fresher, the fuel should be.

 

[antiqueshell]

Like another poster mentioned about 1-2% which acts as a fuel system cleaner, and fuel line antifreeze.

Leave most the corn for our food stuffs.