E10 is bad enough but E15 is a killer!

[EagleMark]

Ethanol sucks! Besides raising food prices it all rots your fuel system.

http://video.foxbusiness.com/v/20008...as-in-your-car

[RobertISaar]

E15 wouldn't be so bad on a higher compression/boosted ~mid 90s and newer vehicle if the calibration were tweaked to support it....

but what they're doing is just like what they did with E10....

allowing higher amounts of ethanol(relatively high octane at 99.15 AKI) in the fuel allows the octane of the base gasoline before the addition of ethanol to be significantly lower and still hit the 87 octane rating at the pump. it's a lot cheaper to make gasoline this way, so that's how the refineries will do it.

so, with E0, 87 octane = 87 octane blend of gasoline
E10 87 octane = 85.6 octane base
E15 87 octane = 84.8 octane base

[EagleMark]

What I don't like and they touched on it in the video is the seperation! I have seen this my self in as little of fuel in a float bowl on a lawn mower engine. Puddle of what I thought was water, but from what they said it was seperated enthanol? I always thought the ethonal attracted condensation...

Plus I have seen the rot/corrosion and thorugh damage of complete fuel systems from tank to carb.

Most motorcycles still have carbs and metal tanks, all lawn equiptment etc... our dump fills up with lawn mowers every spring from them sitting all winter.

It's just horrible fuel... Corn is for food!

[RobertISaar]

ethanol combines with water, then it seperates... it tends to stay mixed with gasoline when it hasn't combined with water.

that's why the "fuel anti-freeze" stuff is almost 100% isopropyl alcohol... pour it in the tank, mixes with the gasoline, absorbs water where it can and then gets burned.

[EagleMark]

Yes I familar with fuel line anti freeze... at the truck stops they sell it in little bottle expensive or larger bottle of isopropyl alcohol cheaper...

So far my mileage is up 10% without a tune change by just using 93 non ethanol! Have to calculate if it is cheaper? No knock at WOT!

[RobertISaar]

10% difference in fuel economy means you're winning anytime that fuel is 10% more expensive or lower.

at ~3.30 for 87 around here, anything under 3.63 would be a net gain.