you lose some horsepower and mileage per gallon..
maybe?

I have a flex fuel vehicle and did some research about e 85 vs 91 octane premium.
Research concluded lower performance and less miles per gallon

Not sure if this comparison is apple to oranges to your question

Is that the new 15% ethanol gas?

There is less oxygen at altitude, which requires less octane in the fuel to get the proper mixture. That's why you see 85 octane unleaded in the mountains and nowhere else.

From my experience the prices are still higher than 87 octane in the flatlands, though.

6-11-22

New record high national average gasoline $5.004

New record high national average diesel $5.765

Kansas state average $4.651

Missouri state average $4.656

https://gasprices.aaa.com/

Not being sarcastic.....But I did not know they did that in higher elevations.

June 11, Columbia MO

Everywhere jumped up to $4.89 yesterday and last night

Gas was at least 50 cents cheaper in Wisconsin and Ohio, compared to Indiana and Illinois.

Turnpike.

5.09 First ohio gas station

5.62-last Indiana gas station

6-12-22

New record high national average gasoline $5.01

New record high national average diesel $5.771

Kansas state average $4.661

Missouri state average $4.674

https://gasprices.aaa.com/

$6.00.

6-13-22

New record high national average gasoline $5.014

National average diesel $5.77 ($0.001 decrease)

Kansas state average $4.664

Missouri state average $4.679

https://gasprices.aaa.com/

$4.49

gas was 4.89 in Palmyra, New Jersey.

5.69 in Philadelphia.


Of course, since I was in new Jersey, I COULD NOT PUMP MY OWN GAS!!!!!!!

HOW ****ING STUPID IS THAT?????

Wait what? Is that a thing? I had no idea.

You are not allowed to pump you own gas in NJ. Oregon allowed it a few years ago and people freaked out.

I need to pay better attention to things, I never knew that. What's the reasoning behind not pumping your own gas? Something like this....


https://c.tenor.com/hnM3fe1NLaYAAAAC...oregon-gas.gif