i can’t be the only one who runs regular in a GT right?

[K4fxd]

Of course you can go too high and then have a new set of issues…

What issues would these be?

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[TrackMustang]

What issues would these be?

The higher the octane rating, the slower and colder the fuel burns. If you run too much octane in your engine it won’t run very well because the burn is way too slow.

Mind you, in a 5.0 this would be like 104 and up… maybe even higher before it became an issue.

 

[PoCoBob]

I used to live in an area of the province that is a 5 hour drive from where I live now. I still go back to visit friends and family a lot. Those days I use 87, I'm going to burn most of the tank just getting there and the drop in fuel economy doesn't even come close to make up the difference in pricing.

I've been driving for 45 years now and during that time I have seen/read countless reports about octane. Not one of those reports said there was any measurable difference when using a higher octane then what was recommended by the manufacture, not one. And for this car Ford recommends 91 so that is what I put in the rest of the time.

 

[Dave2013M3]

There is a point of diminishing return with octane. With stock fuel maps probably around 94-95 octane is max for these cars. Anything beyond 93 octane will not get the same results as 87,89 to 93.

 

[JoeSpeed]

lol totally got judged by this older guy who was a gas attendant at wawa today. unfortunately in nj we can’t pump our own gas (absolutely stupid) and i said fill her regular please, and he was like, what, regular? don’t you mean like super? i was like no man, regular, it’s already 3.35 a gallon so yeah guy totally judged me bc he asked me like two times if i said fill it regular. lol. feel like they all judge me!

You let them pump your gas? I dont, i got my card ready and am pumping by the time they acknowledge me.

Also, why skimp? Granted I gotta Bronco, but even then, shes thirsty and I want that extra 30hp, worth the price imo

 

[331GT]

That's about the same as we get in the Midwest from Speedway stations. It is lower when the car hibernates for winter, but I don't buy that. I run one tank of 93 for winter starts and the occasional nice day drive.

have you tested it? ive been curious what it is around chicagoland. i almost always go to speedways or thorntons, mostly because theyre often the only ones who carry E85 around me or where im generally commuting to/from. good to know if it's generally that high of ethanol content.

 

[LSchicago]

have you tested it? ive been curious what it is around chicagoland. i almost always go to speedways or thorntons, mostly because theyre often the only ones who carry E85 around me or where im generally commuting to/from. good to know if it's generally that high of ethanol content.

Yes I test every tank. Last one was at 85%, and I've seen as high as 90%. Speedway consistently has good E85 in the Chicago area spring to fall.

 

[K4fxd]

The higher the octane rating, the slower and colder the fuel burns. If you run too much octane in your engine it won’t run very well because the burn is way too slow.

Sorry that is an old wives tale. Too much octane won't do anything except make your wallet lighter from the cost of the fuel.

 

[331GT]

Yes I test every tank. Last one was at 85%, and I've seen as high as 90%. Speedway consistently has good E85 in the Chicago area spring to fall.

good to know, thanks!

 

[groove93]

You let them pump your gas? I dont, i got my card ready and am pumping by the time they acknowledge me.

Also, why skimp? Granted I gotta Bronco, but even then, shes thirsty and I want that extra 30hp, worth the price imo

It's a New Jersey thing. Gas attendents pump the gas for you. I believe there's one more state in the country that does not allow Self-Service. All I know is that when I moved from Jersey to California back in 93, two things stood out. A "Slice and a Coke" gave me so many strange looks, and learning to Fill the Tank could be demoralizing.

 

[JoeSpeed]

It's a New Jersey thing. Gas attendents pump the gas for you. I believe there's one more state in the country that does not allow Self-Service. All I know is that when I moved from Jersey to California back in 93, two things stood out. A "Slice and a Coke" gave me so many strange looks, and learning to Fill the Tank could be demoralizing.

Definitely a Jersey thing, but only time they bitched at me was the literally retarded guy they had at Quick Chek in Eatontown, just nodded and smiled as he went off, like sure thing buddy. Otherwise no matter where I go, they’re like “you got it?” And walk away, or ask about her

demoralizing huh? Been ages since I had a slice and coke btw.

 

[TrackMustang]

Sorry that is an old wives tale. Too much octane won't do anything except make your wallet lighter from the cost of the fuel.

Higher octane creating a lower burn is not an old wives tale, it’s literally the definition of octane rating. The higher the octane the higher pressure the spontaneous combustion of the fuel occurs. If you don’t believe fuel that’s too high of an octane can negatively effect your car then put the highest octane fuel you can get your hands on from VP and run it in your car. It’s like retarding your ignition.

 

[groove93]

demoralizing huh? Been ages since I had a slice and coke btw.

Yea, I recall driving from Stockton to Los Angeles with my Sister-in-Law, and needing to fill up the tank. For years, I've watched these attendents fill up my mother's tank, so I had the "Rhythm" down, but when it came to me performing the same task, I was a dog in the middle of the highway.

 

[K4fxd]

Higher octane creating a lower burn is not an old wives tale, it’s literally the definition of octane rating. The higher the octane the higher pressure the spontaneous combustion of the fuel occurs. If you don’t believe fuel that’s too high of an octane can negatively effect your car then put the highest octane fuel you can get your hands on from VP and run it in your car. It’s like retarding your ignition.

My old 360 powered cordoba ran 15.5 1/4 miles. I had some left over C-16 and filled her up. Ran a 15.5.

The slower burn is a myth that makes it easy to explane octane to people. Don't take my word, call VP and ask the tech dept.

 

[velocityblue5.0]

jersey is definitely annoying for it. i pump my own gas at work at our municipal fuel station, it’s not like we hire people to sit out there and attend it for municipal vehicles…but i guess bc it’s government in nj it’s ok, but the public, god forbid they do it!!! ridiculous lol. and i’m sure i will try using 91 once i stop wasting so much gas driving around daily all over just bc she’s brand new lol

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