Anyone have any comments about 87 vs 91 octane?

Ruffrider

Founding Member

Mar 15, 2001

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Citrus Springs, FL

Dec 18, 2003

#21

• Dec 18, 2003

• #21

I use regular. I don't see a need for using anything over 87 octane in the car until I do some serious performance work. Plus ford says to use it.

 

J

joejoejc

New Member

Aug 8, 2003

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Rochester NY

Dec 18, 2003

#22

• Dec 18, 2003

• #22

93 or nothin at all for me

 

J

jimfitzgerald

New Member

Apr 11, 2001

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Dec 18, 2003

#23

• Dec 18, 2003

• #23

joejoejc said:

93 or nothin at all for me

Click to expand...

Why? 87 or 89 will make more power, unless you need 93 due to advanced timing or to prevent detonation.

 

HoustonGT

Gilded Gelding

Apr 6, 2003

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Houston

Dec 18, 2003

#24

• Dec 18, 2003

• #24

I run 87 all the time, but maybe once a month ill use 93. Just makes me better. Also, i every couple thousand miles, i pour in some fuel injector cleaner.

OT:Can a dirty fuel filter significantly hurt gas mileage?

 

COramprat

...I can take it. I think.

20+ Year Stangneter

Mar 2, 2003

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Sea of Tranquility

Dec 18, 2003

#25

• Dec 18, 2003

• #25

I get a really nasty ping with 87 when I romp on it but for just normal driving it is OK. 89 seems to do OK and every now and then for good measure I'll do a tank of 92.

 

E

el_kid_1

New Member

Oct 30, 2003

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Puerto Rico

Dec 19, 2003

#26

• Dec 19, 2003

• #26

I've always run on 93 octane ever since I got the Superchip. They told me I had to run on 93...not sure why...

 

rdgdawgGT

New Member

May 6, 2003

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Atlanta, GA

Dec 19, 2003

#27

• Dec 19, 2003

• #27

93 after reflash... 87 before... "seems" like my mileage is better, defintely runs better... I'm sure that it's the combo, but the posts are corect, no need to run higher octane til the mods go thru...

 

john_324

New Member

Jan 14, 2003

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Washington, D.C.

Dec 19, 2003

#28

• Dec 19, 2003

• #28

On a related note, what's up with the owner's manual saying that occasional, slight detonation is okay, and within normal operating conditions?!

I thought detonation is always a bad thing, but Ford says (in print) not necessarily so...

Any thoughts?