Regular unleaded vs Premium gas

[BarberStang]

U having any trouble with the "upgraded" Exxon app? It can no longer detect my location. Lots of complaints in Play Store about it.

I havent even tried getting gas actually on it rather than the barcode inside the store since the update. So far its a big thumbs down for it. Looks pretty, but functionally sucks.

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[Deleted member 35644]

I havent even tried getting gas actually on it rather than the barcode inside the store since the update. So far its a big thumbs down for it. Looks pretty, but functionally sucks.

They pretty much ruined it from what I can tell. I can no longer activate the pump as I pull up to it. Not a big deal, but now I have to scan the sticker on the pump before I can start pumping. Still better than using a credit card on the pump, but they're supposed to make things better with an upgrade, not make it harder to use.

 

[BarberStang]

They pretty much ruined it from what I can tell. I can no longer activate the pump as I pull up to it. Not a big deal, but now I have to scan the sticker on the pump before I can start pumping. Still better than using a credit card on the pump, but they're supposed to make things better with an upgrade, not make it harder to use.

Dude the QR code doesnt even work now. I usually get a coffee or something, so its not a huge deal. Might as well be a kroger gas station now.

 

[Deleted member 35786]

 

[3star2nr]

93 80% of the time
87 on road trips since it'll piss through a tank in 4 hours anyway...

 

[Smokey613]

All I know is on my 2015 there is a noticeable difference between 87 and 93. I looked up my Gas Buddy logs and found out I had tried 87 for 4 tanks. ( I thought I had only put 2 maybe 3 tanks in ) I too thought there was no difference in performance. Obviously I had gotten acclimated to the 87 performance. I decided to switch back to 93 with my DTE at 20 miles. It took about 1/2 way the tank and the performance difference was obvious. Yes, for me it’s about a $0.40 a gal difference but I will not go back to 87. I am not saying any other Coyote will react similar to mine but I know what mine does. With the mileage we put on ours, it’s about $23 a month and it’s worth it. This thing gets better gas mileage than anything I have ever owned, even my 1979 Chevette.

 

[Bikeman315]

Not sure why this is even a debate. Ford made the car and tested the car. They plainly say in the owner's manual ANY GAS with a minimum rating of 87. spending 16 extra bucks to fill up with 93 or 87 why? What's the proof it does anything better other than waste money? I have always been told the big NA V8 engines were fine with 87(which the owners manual backs up) but the smaller Forced induction high compression 4 Cylinders were what needed premium.

Not arguing I truly want to know what is the reason for saying 93 is better over 87 on a NA car when ford themselves designed it to run on 87? I have run several tanks of 87 and then several tanks of 93 and about the only difference I could tell was my wallet was 32 dollars short after two tanks. If the owners manual says 87 then why not 87? Its warrantied either way so why blow the money? I mean after a year if you get one tank a week...LOL yeah we wish more like 2. But say one tank. 16 bucks (its a dollar difference here between the two) times 52 weeks that's 832 dollars a year and if two tanks a week like most that daily drive then 1664 dollars a year. Or over 5 years 8330 dollars... for what? Na I'll keep using 87 and save the 8K for my next Mustang because Ill buy another one before any mythical issue comes of me using 87 instead of 93

Because debating is what people do on an Internet forum. Everyone has an opinion and they are free to voice it on here. You use 87 and I use 93. Why, because we want too. End of story. Yeah, right

 

[Ebm]

All I know is on my 2015 there is a noticeable difference between 87 and 93. I looked up my Gas Buddy logs and found out I had tried 87 for 4 tanks. ( I thought I had only put 2 maybe 3 tanks in ) I too thought there was no difference in performance. Obviously I had gotten acclimated to the 87 performance. I decided to switch back to 93 with my DTE at 20 miles. It took about 1/2 way the tank and the performance difference was obvious. Yes, for me it’s about a $0.40 a gal difference but I will not go back to 87. I am not saying any other Coyote will react similar to mine but I know what mine does. With the mileage we put on ours, it’s about $23 a month and it’s worth it. This thing gets better gas mileage than anything I have ever owned, even my 1979 Chevette.

It's all in your head. There has been multiple studies on different cars regarding the difference between 87 and 93, including an S550 Mustang(2015-2017 model years). You gain a negligible amount of power switching from 87 to 93. We are talking a whopping 3.2%, which is about 13 hp. Tell me a person who can feel the difference between a car with 400 horsepower and that same car with 413 horsepower? I sure can't. Butt dynos often give the placebo effect.

Study linked here


All bets are off on a modded car with a tune. Also, people put premium gas in their cars for other reasons. Oil dilution for example.

 

[ChiTownStang26]

Everyone should use and do what ever they want to their own car.

Everyone's right that the hp gain is negligible on a stock application.

What people dont know is that when running on 87 stock the engine tends to knock, alot. Yes there is octane logic built into the car and adjusts spark as necessary, but you will still see a good amount of positive knock just crusing around when running 87. For me cruising at 65mph in 6th gear on the highway would yield a consistent +2 degrees of knock as I held the throttle. It cuts timing when the knock sensors see positive knock and that's why it makes a few less ponys. Anyone with access to dataloging equipment (i.e. x4/ngauge) can replicate this and see that the knock is consistent not random. This is why ford recommends 93 but doesnt require it. If it was required and you put 87 in, it would go boom eventually on a wot pull. 87 works fine in the car except it sees alot of knock. If your cars a lease or your going to sell it in a few years then who cares run 87, if your like me and plan on keeping this thing awhile, maybe feed your sports car engine what it wants.

Now I dont have the credentials to say this is bad in the long run for engine health, Im just presenting what I've found and made me never want to put anything lower then 93 in when I was stock. Not for power or gains, but for engine health.

You put shitty food in your body, your body goes to shit eventually, I gotta think an engine is similar.

 

[IronG]

Not sure why this is even a debate. Ford made the car and tested the car. They plainly say in the owner's manual ANY GAS with a minimum rating of 87. spending 16 extra bucks to fill up with 93 or 87 why? What's the proof it does anything better other than waste money? I have always been told the big NA V8 engines were fine with 87(which the owners manual backs up) but the smaller Forced induction high compression 4 Cylinders were what needed premium.

Not arguing I truly want to know what is the reason for saying 93 is better over 87 on a NA car when ford themselves designed it to run on 87? I have run several tanks of 87 and then several tanks of 93 and about the only difference I could tell was my wallet was 32 dollars short after two tanks. If the owners manual says 87 then why not 87? Its warrantied either way so why blow the money? I mean after a year if you get one tank a week...LOL yeah we wish more like 2. But say one tank. 16 bucks (its a dollar difference here between the two) times 52 weeks that's 832 dollars a year and if two tanks a week like most that daily drive then 1664 dollars a year. Or over 5 years 8330 dollars... for what? Na I'll keep using 87 and save the 8K for my next Mustang because Ill buy another one before any mythical issue comes of me using 87 instead of 93

Not sure why it costs some much more for you than me, but my local Costco has premium for 39 cents more than regular. Sure it is more, but not a dollar + more. For me the extra cost is worth every penny. Would not be the case for my wife's Honda pilot....running premium in that would be a total waste of money.

 

[Shifting_Gears]

93 always. I fill up once a week typically. I don’t mind paying more knowing I’m getting the most out of the fuel. Plus if the additives in most 93 octane fuels help the engine burn cleaner and more efficient, that’s cost saving in itself.

 

[Smokey613]

It's all in your head. There has been multiple studies on different cars regarding the difference between 87 and 93, including an S550 Mustang(2015-2017 model years). You gain a negligible amount of power switching from 87 to 93. We are talking a whopping 3.2%, which is about 13 hp. Tell me a person who can feel the difference between a car with 400 horsepower and that same car with 413 horsepower? I sure can't. Butt dynos often give the placebo effect.

Study linked here


All bets are off on a modded car with a tune. Also, people put premium gas in their cars for other reasons. Oil dilution for example.

Whatever..... I know what I know about MY Mustang. I can’t speak for anybody else’s Mustang. There is more to the equation than WOT on a dyno. MY Mustang IS better throughout the power band, especially below 4K rpm when I am running 93 octane.

 

[bootlegger]

E85 for 1.5 years. Corn is too fun to stop using.

 

[Deleted member 35644]

Dude the QR code doesnt even work now. I usually get a coffee or something, so its not a huge deal. Might as well be a kroger gas station now.

Got gas on Sunday at my usual station. Looks like they fixed the locator. It activated from my phone like it used to. WOOOOOT!

 

[ChiTownStang26]

@Briebee72

I answered your question a few posts up, little lengthy but I hope it's the answer your looking for...

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