Does it make a difference?
 

Sunoco 93 octane with 10% ethanol versus Shell 93 octane with no ethanol. Does it make any difference? Just wondering.

my gas in my area pretty much all have some levels of corn inside.

even the driver fuels himself with corn sometimes..

:icon17:

There aren't to many Sunoco station out west, but Shell gas is my favorite as it performs better than any other craptane in our region of the world. Ethanol does not impact the modern car like it did with older models.

From my experience it makes more of a difference with things like motorcycles... in fact there's a swelling/cracking tank issue caused by ethanol.:shakes head: I haven't heard of modern cars being too effected though.

You get slightly fewer MPG with ethanol and it can cause water-related problems (but not that big of a deal if you buy from a station with clean storage tanks). I run no-ethanol gas when possible but have no qualms about filling up with gasahol when necessary.

As far as octane goes, all 93 rated fuels should have the same knock properties.

Just for reference,
1gal pure gasoline contains 114,000 BTU of energy
1gal pure ethanol contain 76,100 BTU of energy
Or about 33.2% less energy
Less energy less mpg less range.

PS Due to how ethanol burns, through tuning and some mods more power can be produced easier with ethanol.

I wouldn't worry about such a small ethanol content.

Now, how did you come up with certainty of ethanol content? Do you own a reliable measuring device or did you go by the little stickers?

we all go by the little stickers and posted whp

Octanes?
 

Higher altitudes use lower Octanes, 92-91(Shell) because the air is thinner. Knot just my opinion, I did some serious checking. FWIW
PS: I been known to pull a corn cork.