no_ss

iTrader: (2)

Where I live there is ethanol free gas advertised everywhere. I was just wondering what ethanol free 91 would be like in my car? Okay? Or bad? I know the ethanol in fuel isn't very efficient when it comes to mpg and performance but I was jw. Would I need a different tune as well? I wouldn't think I would and I'm about to install my new PnP throttle body that I got on here. So I thought it would be cool to do both at once. Would I see any gains?

nathan112i

ethanol is what you want for performance, there is 0% ethanol in the gas i use and even being 94 octane its wanting to knock at low timing levels. generally most cars can cope with %0-%10 ethanol without any issues. i think you need a bit more info before more people can help you out on here. like what engine/tune do you have

no_ss

iTrader: (2)

I don't have a tune and I have a 2.2 N/A engine

Jesse

iTrader: (4)

I had the misfortune of running ethanol-free 91 on my bolted 2.2 and it was ****. Knock out the ass. Never again.


Where are you located?

no_ss

iTrader: (2)

southwest Florida. 8ft above sea level. And I think I'll stick to running 93 then. I run 93 now and it's fine.

KMO43

94 is E-10. 10% E doesn't require a tune I like E-10 fuel wish I could get up to E-47 at least. Do you have a way to log knock? If so try it and if it doesn't knock which on stock tune it shouldn't you'll get a tiny bit more mileage but so small you prob wouldn't notice

nathan112i

94 does not contain any ethanol here unfortunately.

KMO43

Are you sure Chevrons in Kelowna do.

nathan112i

yes on the mainland there is ethanol in the gas, everywhere in nanaimo has 0% ethanol in the gas no matter the grade. i went hunting for it with no luck

KMO43

Car Care FAQs

here's a clip:

Q. What is Ethanol?
A. Ethanol is ethyl alcohol or grain alcohol, mainly produced in the Midwestern United States from corn stock and in more limited quantities in Canada from wheat. It can be used as a biofuel alternative to gasoline. British Columbia and Canada require that gasolines contain an average of 5 % renewable fuel content. To meet BC's Renewable Fuel Standard, Chevron gasolines may contain up to 10% ethanol.

Jesse

iTrader: (4)

I'm jealous of all you guys that have access to 93, 94... ******. I'm lucky to have an E85 station about 25 miles from my house, which is on the way to work. But I'm not tuned for it yet.

KMO43

Well I'd rather have E here than 94 but with 94 and meth injection I was still able to get 20* on my bigwheel LNF

Jesse

iTrader: (4)

I am not even boosted but I'd still like access to at least 93. I'd like to dyno my car NA with E85 just to see how it does before boosting it.


My 2.2NA gets no respect, which is exactly how I want it. It's got just enough power to put to shame any dumb ******** with completely stock cars who want to "put me in my place." Like the guy in the '14 Tundra this afternoon.

KMO43

I haven't seen a N/A 93 vs N/A E85 done before

no_ss

iTrader: (2)

I'm gonna try like a couple gallons of 91 ethanol free and see how it goes. If bad I'll just fill the rest up with 93

KMO43

Since you don't have a tune you should be more than fine the car is tuned to not need 91 stock

What bolt ons do you have

no_ss

iTrader: (2)

I have a header, a catback, a CAI and I'm about to put a PnP throttle body on.

KMO43

I would get a tune if I was you the Cai and tb will throw the fuel trims off

no_ss

iTrader: (2)

there's no point in getting a tune now, I was trying to just buy a 2.2 pcm that's been tuned for an 07+ cobalt with similar mods, but I'm buying the first part for my supercharger on Friday. I'm gonna piece it together. I've been running 93 with everything but the throttle body and it's been fine.

sandman

iTrader: (4)

93 is a little unnecessary.

no_ss

iTrader: (2)

I was told that it was okay to do it because it's cleaner and the few extra bucks doesn't hurt me.

KMO43

It's good to do for you because your trims will be off so it'll give you some headroom but on a stock tune it's still prob a bit much

no_ss

iTrader: (2)

oh well I'm gonna rebuild the engine anyways if it comes down to it effecting it that much.

KMO43

Not what I meant. With the fuel trims off the computer has to compensate to get to the target A/F ratio which can result in knock. Your car in tuned for 87 so after you added all the mods which threw off the MAF trims going to a higher octane is a good idea but I think 93 is too much so I believe you can get away with 89 to 91 with 93 being a waste on the extra money

no_ss

iTrader: (2)

91 ethanol free and 93 (I think it has ethanol) are the same amount of $$$