MorePowerTuning

First off, make sure you are on the latest version. Do that by shooting us an email(not pm) to check out your customer folder. (Name/Serial number) Once verified you are on the latest version, run the 93 tune with 93 in the tank. If in doubt, log it and we can tell you if it needs to be adjusted to a "winter blend" version.

johndeerefarmer

Thanks for the informative post. I have one question. You said "87 octane combined with winter blend is more like 82 octane."

Can you explain this statement? The way I understand it the 87 rating is a minimum that is set and you cannot go below it. The RVP changes with the winter blend but the octane remains the same. So how is 87 octane winter blend more like 82? Are you saying that the winter formulation will knock more even though the octane is the same?

itguy08

Subscribing to see the data log info. Would love to see what to log with the Torque Pro app to track knock events. Especially since I run the cheapest swill in both my Ecoboosts.

kyrenegade

Interesting read. Not sure if its true but a few other articles I scanned said similar things.
I've never put anything but 93 in the tank and will continue to do so tuned or not.

http://zhome.com/ZCMnL/PICS/winterGas/winterGas.html

Partial quote from article.

"Here's the poop: As specified by state law, reformulated winter gas contains any number of lighter, lower-boiling-point hydrocarbons (butane, propane, etc.) that just so happen to have an excellent octane value. Added to this may be any number of oxygen-bearing ether compounds (MTBE, ETBE, ethanol) that improve emissions and also have a relatively high octane blending value. So what's all the bad hype for? Price, for one thing "It's actually more expensive to make reformulated winter gas than normal, summer fuel, ' says Thomas Hart. Lower fuel economy is another concern.
"The oxygen-bearing compounds displace fuel components, so it takes more fuel to get the job done. Normal gasoline has a stoichiometric ratio of 14.7:1, reformulated winter fuel runs between 14.3 and 14.4:1," says Mitch Markusich.
And the complaints about poor performance? Mitch says, "When people bitch about the fuel, it's not really the fuel's fault. The weather is largely responsible; after all, it is winter. Low cranking voltage in the battery, increased oil viscosity, atmospheric condensation in underground fuel tanks and so forth."
The bottom line is that when it's cold, winter gas seems to be the hot ticket for performance enthusiasts. Not only is the dense winter air good for horsepower, but the higher oxygen content and octane value of winter gas make the pot sweeter And as for fuel economy and price? When did that ever get in the way of having a good time behind the wheel? It s just too bad we have to deal with all that snow and ice".

Tothemax

Good info, thanks

SkiSmuggs

And other articles talk about summer gas being more expensive because it is purer than winter gas which is diluted by butane, etc. Winter blend has less energy so it takes more of it to move the vehicle. So summer gas is purer, more efficient, burns cleaner and more expensive to make according to most of the articles. There seems to be some conflict in the articles and that is the only one I saw talking about higher octane winter fuel.

gillysmi

is for an unturned truck also??


if I have to run 91 in my EB at 15 cents more than a gallon of diesel and more than 50 cents more than 89... that is another nail in the coffin. at 13.0 mpg's lifetime I will drive something else.

JasonNez

^ Just curious where you live. $.50 between 89 and 91 is a lot. Here in upstate N.Y. the difference between 87 and 93 is around $.30.

gillysmi

South Dakota. drove by station tonight. 91 premium is $3.99. 87 is $3.45. actually that is $.54. 89 with 10% ethanol is $3.37

Ecofx86

maybe you sound be driving something with better gas mileage like a Honda civic or corolla. I can't comprehend how .50 cents is going to break the bank.


Btw I dd a civic can't beat 33mpg back n forth to work!