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2014 GT on regular 87 octane gas?

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Old 03-18-2014, 11:14 AM   #1
jhawkr
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Default 2014 GT on regular 87 octane gas?

The past month I have been using regular gas in my 2014 GT. The only difference I have noticed is about 4/10 less MPG. With a .25 cent differential between regular and premium, I think I'll run regular during the cold months and switch back to premium in the summer when there is more risk of detonation. I'm not racing so I don't miss the few extra ponies. It's still bad-***, even on regular!
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Old 03-18-2014, 12:32 PM   #2
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I was just going to ask that question about premium fuel in 2014 GT. Is it required?
I see the specs for GT that Premium fuel is recommended. I currently have a 2010 V6. Looking to upgrade to GT. But that premium fuel has put me off. Is the 3.7 Liter 304 HP V6 a big jump from my 4.0 liter V6? as far as performance.
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Old 03-18-2014, 02:11 PM   #3
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Originally Posted by jhawkr View Post
The past month I have been using regular gas in my 2014 GT. The only difference I have noticed is about 4/10 less MPG. With a .25 cent differential between regular and premium, I think I'll run regular during the cold months and switch back to premium in the summer when there is more risk of detonation. I'm not racing so I don't miss the few extra ponies. It's still bad-***, even on regular!
That's what I do. I have a Brenspeed hand held programmer. I run 87 octane tune in winter and in summer I switch to 93 octane. Works out OK for me.
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Old 03-18-2014, 02:26 PM   #4
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Originally Posted by chromebluestrat View Post
I was just going to ask that question about premium fuel in 2014 GT. Is it required?
I see the specs for GT that Premium fuel is recommended. I currently have a 2010 V6. Looking to upgrade to GT. But that premium fuel has put me off. Is the 3.7 Liter 304 HP V6 a big jump from my 4.0 liter V6? as far as performance.
Premium fuel would be a deal breaker...really? To each there own I guess. If I were worried about fuel consumption or fuel type I'd look at a 4 banger from any of the OEM's including Ford (Focus/Fiesta).

Anyways...it's all in the wording.

REQUIRED vs RECOMMENDED. Required means the car is not designed to run on anything less. Recommended means that in order to get the advertised performance you MUST run premium. Some cars like the 08 Bullitt has dual fuel maps. One for premium, one for regular. If it says recommended, then you can run regular. Just be aware you will get less performance with the lower octane...or buy a handheld tuner and use the lower octane tune as someone else dose.
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if you are getting 29mpg in your 5.0, you aren't driving it correctly
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Old 03-18-2014, 02:51 PM   #5
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Premium fuel would be a deal breaker...really? To each there own I guess. If I were worried about fuel consumption or fuel type I'd look at a 4 banger from any of the OEM's including Ford (Focus/Fiesta).
It certainly isn't a deal-breaker for me, I bought mine last May. I have a 2012 Focus 5-dr SEL too, but that's for the wife. I do have to use my GT as a daily driver, to and from work. It has sufficient power on 87 Octane to get me into all the trouble I need. The only reason I would switch back is that during hot weather, detonation(pinging) can be a problem. I don't want that to ever happen.
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Old 03-18-2014, 03:04 PM   #6
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I wasn't aware of premium fuel recommendation until I read up on specs of GT. it's not a deal breaker. Just a question. Thanks
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Old 03-18-2014, 03:13 PM   #7
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Originally Posted by chromebluestrat View Post
I was just going to ask that question about premium fuel in 2014 GT. Is it required?
I see the specs for GT that Premium fuel is recommended. I currently have a 2010 V6. Looking to upgrade to GT. But that premium fuel has put me off. Is the 3.7 Liter 304 HP V6 a big jump from my 4.0 liter V6? as far as performance.
well you're going from 200ish horsepower all the was up to over 300 horsepower, of course that's a massive jump in performance.
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Old 03-18-2014, 05:11 PM   #8
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Originally Posted by jhawkr View Post
The past month I have been using regular gas in my 2014 GT. The only difference I have noticed is about 4/10 less MPG. With a .25 cent differential between regular and premium, I think I'll run regular during the cold months and switch back to premium in the summer when there is more risk of detonation. I'm not racing so I don't miss the few extra ponies. It's still bad-***, even on regular!
That's a good plan. My '12 doesn't have the high octane fuel recommendation, but I would imagine that it is better to give the computer a couple of fill-ups to actually gain/drop power when switching between octanes. Buy a high octane (91 or 93) tune and I bet that you forget that regular gasoline is even an option
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Old 03-18-2014, 05:20 PM   #9
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That's a good plan. My '12 doesn't have the high octane fuel recommendation, but I would imagine that it is better to give the computer a couple of fill-ups to actually gain/drop power when switching between octanes. Buy a high octane (91 or 93) tune and I bet that you forget that regular gasoline is even an option
all 11+ 5.0's recommend Premium, but it's not required.
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Old 03-18-2014, 06:51 PM   #10
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.25 per gallon * 14 = $3.50 per fill-up to use premium. I use about a tank a week, so $14 more a month.

Considering what the monthly payments on cars are, an extra $14 a month for premium gas is inconsequential.
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Old 03-18-2014, 06:58 PM   #11
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I always run Premium in my 14 GT. My last car required Premium so I'm used to buying it.

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Old 03-19-2014, 07:40 AM   #12
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.25 per gallon * 14 = $3.50 per fill-up to use premium. I use about a tank a week, so $14 more a month.

Considering what the monthly payments on cars are, an extra $14 a month for premium gas is inconsequential.
I use about 600 gallons a year, similar to your use. If I use regular for 2/3 of the year, that would be 400 * .25 = $100/yr. Over 5 years that's $500, provided the price differential remains the same. $500 = $500 and with inflation no doubt to be factored in,
$500 > Future $500. It all adds up and counts toward your bottom line. $14 a month doesn't sound like much but $14 a week for 5-10-20 years should get ones attention.
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Old 03-19-2014, 08:08 AM   #13
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Quote:
Originally Posted by chromebluestrat View Post
I was just going to ask that question about premium fuel in 2014 GT. Is it required?
I see the specs for GT that Premium fuel is recommended. I currently have a 2010 V6. Looking to upgrade to GT. But that premium fuel has put me off. Is the 3.7 Liter 304 HP V6 a big jump from my 4.0 liter V6? as far as performance.
Almost 100 hp increase, the DOHC 3.7 has variable timing and can tell the octane and adjust itself, from 305 to 315 hp.
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Old 03-19-2014, 08:42 AM   #14
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I might try premium in my 3.7 to see if I get a MPG increase. In all of my past cars if I used premium I did get a MPG increase. I had to use premium in my Cadillac and I used to complain about it, but reality it was only a couple more bucks a fill up and the car liked it better.

I agree with the person who explained recommended versus required. The cars will self adjust to whatever fuel you use but will get the optimum performance with the higher octane.

I don't even think a tune is all that necessary. The car will adjust itself.
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Old 03-19-2014, 09:21 AM   #15
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.25 per gallon * 14 = $3.50 per fill-up to use premium. I use about a tank a week, so $14 more a month.

Considering what the monthly payments on cars are, an extra $14 a month for premium gas is inconsequential.
My thoughts exactly. One should not buy a Mustang in the first place if you are concerned about fuel costs. Your driving style will make a bigger difference to MPG than the octane rating you buy. I could get 25MPG if I babied my 5.0 around town. But I don't, so I get about 18MPG on average. Drive it like you stole it.
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Old 03-19-2014, 12:32 PM   #16
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Premium in my tank ALL the time. PERIOD. Every extra pony matters IMO. You gotta pay to play
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Old 03-19-2014, 02:33 PM   #17
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Originally Posted by artdohc View Post
.25 per gallon * 14 = $3.50 per fill-up to use premium. I use about a tank a week, so $14 more a month.

Considering what the monthly payments on cars are, an extra $14 a month for premium gas is inconsequential.
That is my point exactly.....

In the greater scheme of things and overall cost of ownership, $500 is a drop in the bucket. Insurance, tires, and performance mods (which we all do with these cars) are a far greater contributors to the cost of ownership.

Again, I guess to some that extra $14 matters...and again...you should be looking elsewhere IMO.
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Quote:
Originally Posted by LostBoyz View Post
if you are getting 29mpg in your 5.0, you aren't driving it correctly
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Old 03-19-2014, 02:37 PM   #18
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I might try premium in my 3.7 to see if I get a MPG increase. In all of my past cars if I used premium I did get a MPG increase. I had to use premium in my Cadillac and I used to complain about it, but reality it was only a couple more bucks a fill up and the car liked it better.

I agree with the person who explained recommended versus required. The cars will self adjust to whatever fuel you use but will get the optimum performance with the higher octane.

I don't even think a tune is all that necessary. The car will adjust itself.
It only works backwards... In other words, if the car says recommended 91 octane then you can use any grade you want.

If it states recommended 87 (or nothing about premium fuels) then to use a higher octane will not net any gains. Just a lighter wallet

The only exception is an aging engine where you have carbon deposits. Higher octane will help against pinging.
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Quote:
Originally Posted by LostBoyz View Post
if you are getting 29mpg in your 5.0, you aren't driving it correctly
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Old 03-20-2014, 07:11 AM   #19
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My thoughts exactly. One should not buy a Mustang in the first place if you are concerned about fuel costs. Your driving style will make a bigger difference to MPG than the octane rating you buy. I could get 25MPG if I babied my 5.0 around town. But I don't, so I get about 18MPG on average. Drive it like you stole it.
I knew you'd be around here! I agree 100%!

If I was concerned about saving a buck I guess I would have read the 'recommended' fuel grade. I always run 93, and have a tune.

Quote:
I don't even think a tune is all that necessary. The car will adjust itself.
On the contrary. The car will adjust itself a little bit, but to truly see/feel performance gains you need a tune. I know from experience that the 5.0 has a lot left on the table in stock form. I would suspect that the 3.7 is no different.

To the person who asked about a difference in 3.7 vs. 5.0. The difference is huge! It takes a lot of $$$ to match the stock HP of the 5.0 with the 3.7. If you can afford the car, it is well worth the little bit of extra dough to buy premium fuel. And don't complain when you don't get 30 mpg, mileage is significantly lower.
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Old 03-20-2014, 07:26 AM   #20
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Again, I guess to some that extra $14 matters...and again...you should be looking elsewhere IMO.
Says you. Watching your money is a positive attribute and you will learn that someday. Or you won't and you will end up with nothing. $500/yr for 10 years is $5000. If you can save that money, and you are not using the full potential of your car anyway, why waste the money? I drive a Mustang because I like Mustangs. I've owned a 66, a 67, a 2010GT and the current 2014GT. (I wanted the last of the generation). And, I can afford it. I just choose not to spend money unnecessarily.
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Old 03-20-2014, 07:26 AM
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