Fuel blends E10 E15 E20

[BULL]

FYI, your "E10" might be more than that.

https://youtube.com/shorts/0u4_E60IRTk

 

[Speedy!]

My 170 says 11% on straight 93 around here.

Honestly if cars were setup for it a E40 would be a nice sweet spot.

 

[Jack_Toepfer]

So if I get e85 at the pump, what’s the octane of the gas they’re diluting the e100 with?
For example, to make e40, I’d use “e85” + some amount of e10 gasoline… does it matter if it’s 87 or 93?

 

[Speedy!]

My buddy who worked in oil and gas says E85 isn't cut with gasoline but "some hydrocarbon"

 

[Jack_Toepfer]

That explains the 33% loss

 

[Speedy!]

You probably know this, but just in case alcohol has less energy per gram than gasoline, about 30% less as it turns out. So it takes 30% more volume to get the same bang out of it. Benefit is more volume means cooler, but you do lose mpg.

 

[2ndAmend]

Local 93 and 94 shows up as E9 in the 170.

Next week I'm driving 40mi into MA to get some E85, which has been reported to actually be E72... For most people that would be a good thing... But adding E72 to a near empty tank I might end up with less then optimal E content...