Running regular gas

[FoMoCoSHO]

E85 has an effective octane of 160 when directly injected.

Knock retard and OAR are helpful when determining if you have the required Octane for your tune unless your tuner has fooled with those strategies.

[A 01 Badger]

If you have E-85 available you could have the best of both worlds.

3 gals of E85 and 16 gals of 89 gets you to 91.5 octane. Me personally, I would probably try the 93 tune and see how KR behaves as I suspect it would be fine due to ethanol's enhanced capabilities when directly injected. This would total 22% and should keep your rail pressure in check.

If I did see increased KR then I would just load a 91 tune. Granted you'd lose a little power over the 93 tune but still a helluva lot more fun than 87 when you encounter random nice days throughout the winter.

Interesting thought, and I like the idea of being able to keep a tune on but I am not sure how easily available e85 is as I have never really paid attention.  I also don't know how comfortable I am mixing gas.  For now I went to stock, but I am going to pay attention to the availability of e85 and perhaps give that a go later in the season if the spread in gas prices doesn't come in a bit.

[Vortech347]

Need to be careful mixing E85 though.  You need MORE fuel to obtain the correct A/F it requires.  Otherwise it could lean out the car.  You don't just have octane to figure.

[FoMoCoSHO]

Need to be careful mixing E85 though.  You need MORE fuel to obtain the correct A/F it requires.  Otherwise it could lean out the car.  You don't just have octane to figure.

http://www.ecoboostperformanceforum.com/index.php/topic,5478.0.html

[Livernois Motorsports]

I assume this is similar across the country but gas has come down big time in the past few weeks in Wisconsin. As low as $1.60 in some places, the problem is 93 octane has stayed up around $2.80.  My question is if I revert to the stock tune can I run 87 octane?  I usually wouldn't care about the difference in price but I put a lot of miles on my car for work.

With the crappy weather and road conditions, I really don't take advantage of my 93 tune anyway. 20 bucks a tank savings when I fill up twice a week will add up fast.  My last two vehicles ran premium so I kept buying it when I got the SHO and didn't test regular before I tuned. My guess is it will be ok, I ran the last two tanks in my wife's untuned xSport with no issues but I want to see if anyone here has experience running 87 on the stock tune.

We can create an 87 octane tune for your vehicle if you would like, all you need to do is send me a request.  I will forward it over to my calibrator if needed to have him work on it this weekend or Monday.  The tune is more of a transmission calibration with drivability improvements as well.  We do not typically create them for each customer on the 2013+ models but have always sent them to customer's that requested.  Similar to the Stage 1 tune we use still for those who want it on the 2010-12 SHO, Flex, MKS, MKT.

Send your info including the serial number of your tuner to help expedite the process to tuning@livernoismotorsports.com or info@ works as well. 

[TSS]

OP, Near me, 93 has gone down too.....not just 87.  Maybe in your area it will catch up too.   That is quite a difference you quoted...... $1.20 a gallon difference,  holy cow!

[donky4444]

I filled up Wednesday and regular as $1.57 but 93 was $2.27. I was floored to see it was $0.70 more for premium. I'm used to 0.30 more so was taken back. It was a Shell station so I thought it was just them for their new V plus gas.

[FoMoCoSHO]

I filled up Wednesday and regular as $1.57 but 93 was $2.27. I was floored to see it was $0.70 more for premium. I'm used to 0.30 more so was taken back. It was a Shell station so I thought it was just them for their new V plus gas.

On a positive note, I never thought id see people crying about the cost of 2.30 cent premium fuel again in my lifetime....

[donky4444]

I filled up Wednesday and regular as $1.57 but 93 was $2.27. I was floored to see it was $0.70 more for premium. I'm used to 0.30 more so was taken back. It was a Shell station so I thought it was just them for their new V plus gas.

On a positive note, I never thought id see people crying about the cost of 2.30 cent premium fuel again in my lifetime....

Don't get me wrong, I'm enjoying it. I keep telling myself that at some point this year I'll get 93 premium for less then $2.00. Fingers crossed it actually happens.

[SHOdded]

         Costco      BP     Shell     Exxon  Sam's Club
Regular    1.93    1.99      1.98      2.07        1.92
Premium    2.29    2.59      2.74      2.74        2.50

So, is there a premium on Premium?  You betcha.  Why the spread?  Beats me!

[FoMoCoSHO]

         Costco      BP     Shell     Exxon  Sam's Club
Regular    1.93    1.99      1.98      2.07        1.92
Premium    2.29    2.59      2.74      2.74        2.50

So, is there a premium on Premium?  You betcha.  Why the spread?  Beats me!

Additive packs?

[SHOdded]

Could be.  But Costco is top tier gas, and boasts of high detergent levels, if not additive packs.  And frankly, none of the gas I have used in other high-volume, top tier stations (save that 1 oddball Exxon) made one whit of difference in anything - fuel economy or performance - where my Edge is concerned.

[FoMoCoSHO]

Could be.  But Costco is top tier gas, and boasts of high detergent levels, if not additive packs.  And frankly, none of the gas I have used in other high-volume, top tier stations (save that 1 oddball Exxon) made one whit of difference in anything - fuel economy or performance - where my Edge is concerned.

I'm skeptical as well. But we have to consider what we cant see. Like clean valves. V-power is too new to tell but their refusal to address di specifically leaves me suspicious. That being said, I quit having fuel system issues when I started using shell years ago so I will stick with it, especially the success I've had with it mixing the corn.

[SHOdded]

Definitely, if it works for you, stick with it   Have you tried running just the 93 (after the 93 + corn) to see how much difference it makes?  The fuel system in the Edge is "primitive" enough that I can't really experiment with upping ethanol %ages.

[FoMoCoSHO]

Definitely, if it works for you, stick with it   Have you tried running just the 93 (after the 93 + corn) to see how much difference it makes?  The fuel system in the Edge is "primitive" enough that I can't really experiment with upping ethanol %ages.

It makes a huge difference with KR and knock. My corn tune is much hotter and you saw that one log.....even near stoich at wot, no knock.