When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
The answer you're looking for, i'm here to provide it.
93 mixed with ethanol to 30% is around 96 effective octane.
93 mixed with ethanol to 50% is around 100 effective octane.
tl;dr: you need to have at least a 50% mix with 87 to get where you want.
People proportionately mix ALL THE TIME to get around fuel system requirements with e85. The trucks are 100% designed to deal with partial mixtures as well.
WOW - so to add onto to another member aboves post.
1) adding ethanol doesn't raise the octane rating of the fuel. Yes I know internets and people running e85 swear by it's anti-knock and anti-retard properties and running oodles of timing and. It's not OCTANE however. It just burns cooler. See Octane rating is about the amount of OCTANE molecule in the unit of gasoline. Octane is the good stuff in basic terms. Adding ethanol does nothing for this infact it is watering down your gasoline. That 87 octane you buy that has 10% ethanol in it - starts off as 87 octane pure gas and they put in 10% by volume of Ethanol. And you hope - no water.
2) the company selling that 88 octane stuff is mostly a marketing gimmick they are lightly adding some octane to normal 87 fuel mix - so as to test as 88.
3) 93 octane rated gas that is e10 is again 93 octane pure gas that's been mixed with 10% by volume of ethanol. E85 is 87 octane base gas, that is 85% ethanol by volume the reason it doesn't have a standard octane rating is that it mostly ethanol and octane rating method doesn't apply.
Your engine with stock tuning will run it's best on 93 octane pure gasoline. The power spec ratings for them were all done with 93 octane pure gasoline. YOu can however retune the vehicle to run on e85. You can run pretty well on e85 and you can get high power out of it with major tuning changes. HOwever, you will use significantly more fuel per mile running e85 so don't think this will save you fuel money.
Hopefully this helps weed out some of the details. If you want to run e85 there are some good tunes for it
The octane rating of ethanol fuel IS HIGHER. Whether it's by cooling combustion or other means this is still effectively boosting octane. I don't see how it's any different and it is 100% without a doubt used as an Anti knock additive and oxygenate in lieu of MTBE nowadays.
Lemme put it like this, the cooling effect absolutely plays a part. a 50% ethanol mixture works very similarly to VP MS109 (makes the same horsepower) but what it lacks is repeatability. It will lose power in back to back passes where ms109 won't. 85% ethanol literally outperforms VP MS109 in every way.
WOW - so to add onto to another member aboves post.
1) adding ethanol doesn't raise the octane rating of the fuel. Yes I know internets and people running e85 swear by it's anti-knock and anti-retard properties and running oodles of timing and. It's not OCTANE however. It just burns cooler. See Octane rating is about the amount of OCTANE molecule in the unit of gasoline. Octane is the good stuff in basic terms. Adding ethanol does nothing for this infact it is watering down your gasoline. That 87 octane you buy that has 10% ethanol in it - starts off as 87 octane pure gas and they put in 10% by volume of Ethanol. And you hope - no water.
Adding 10% ethanol to a sub octane gas (which is 85 octane) raises the octane to 86.7 giving you an 87 E10 regular gas. Non ethanol gas known as conventional is a true 87 octane.
2) the company selling that 88 octane stuff is mostly a marketing gimmick they are lightly adding some octane to normal 87 fuel mix - so as to test as 88.
88 octane fuel is 85 sub octane fuel plus the 15% ethanol mixed in to equal 88 octane
3) 93 octane rated gas that is e10 is again 93 octane pure gas that's been mixed with 10% by volume of ethanol. E85 is 87 octane base gas, that is 85% ethanol by volume the reason it doesn't have a standard octane rating is that it mostly ethanol and octane rating method doesn't apply.
93 octane is a sub octane fuel of 91 octane plus 10% alcohol to get 93 octane unless it is a conventional fuel than it is a true 93 octane
Your engine with stock tuning will run it's best on 93 octane pure gasoline. The power spec ratings for them were all done with 93 octane pure gasoline. YOu can however retune the vehicle to run on e85. You can run pretty well on e85 and you can get high power out of it with major tuning changes. HOwever, you will use significantly more fuel per mile running e85 so don't think this will save you fuel money.
On average a F150 5.0 will lose 3 to 4 miles per gallon running E85. compared to E10 regular gasoline
Hopefully this helps weed out some of the details. If you want to run e85 there are some good tunes for it
I am a retired Petroleum Inspector for the State of Wisconsin and yes I was in the lab testing every every pipe line of gas coming into the Granville terminals in Milwaukee
When I initially fired up the app, I couldn't find the ethanol percent either. I found the answer on the ctsvowners.com forum, where some smarter-than-me person figured it out and posted the info. You need to create a custom PID: 220052, the equation you need is (A/255)*100. I did it and it worked perfectly.
02-14-2019, 10:29 AM
