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Author Topic: does anyone use higher octane to save fuel? Back to Topics
groddy86
Rookie Author
Richmond

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Message Posted: Apr 29, 2012 3:35:03 PM

I have heard both stories putting higher octane in a car/truck gives you better gas mileage and horsepower and also that you get worse mpg and harms engine putting in higher octane than what is recommended by manufacturer. Which one is true?
REPLIES (newest first) Post a Reply
Mininana
All-Star Author New York

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Message Posted: Feb 21, 2015 4:08:05 PM

I maintain scrupulous records, including type and octane put in, and where, and never have seen any proof that this affects mileage, even in the mini, for which at least 90 is recommended...
hyeglenn
Champion Author Fresno

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Message Posted: Feb 21, 2015 9:14:06 AM

Most cases will not work.
litesong
Sophomore Author Gary

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Message Posted: Feb 20, 2015 10:21:17 AM

100% gasoline (E0), 87 octane molecules are NOT the same average octane rating as the average gasoline molecules in 87 octane 10% ethanol blends. The 10% ethanol added to gasoline has an octane rating of 114. When ethanol is added to gasoline to make 87 octane, the base gasoline begins with average 84 octane molecules. Therefore, if someone is having either running(knocking?) problems or sub-par mpg problems with 10% ethanol blends, it is probably the base 84 octane gasoline molecules giving problems. Don't go to a higher octane gasoline, but go to 87 octane E0, to rid your car of knocking or sub-par mpg problems. Tho both fuels average 87 octane, the average octane in E0 gasoline molecules is 3 octane points higher than in E10. My mpg for 3 cars, increased 8%, 7% & 5%, burning 87 octane E0 vs 87 octane, E10.

[Edited by: litesong at 2/20/2015 10:23:56 AM EST]
xmstr
Rookie Author Michigan

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Message Posted: Feb 20, 2015 6:40:29 AM

No.
Mizzer1
Champion Author Worcester

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Message Posted: Feb 20, 2015 12:46:25 AM

No
jameskel
Rookie Author Washington

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Message Posted: Feb 18, 2015 5:33:11 PM

HIGHER OCTANE DOES *NOT* INCREASE MILEAGE

it eliminates engine pinging (detonation) from some engines.

I sort of lied.. if you're driving a car that demands 92 octane and you're driving around with 87 octane, you Will see an increase, but only because you were damaging your engine with the lower octane.James
nascar44
Rookie Author New Orleans

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Message Posted: Dec 16, 2014 1:16:09 PM

NO! IF YOUR VEH DOES NOT NEED IT THEN WHY SPEND THE MONEY? If you keep your veh in tune,tp's up. Then your mpg's will be up where they should be....
GasMiser718
Champion Author Detroit

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Message Posted: Dec 9, 2014 4:53:07 PM

I use regular 87 octane, that's what the manufacturer recommends.
Foolingurself
Veteran Author California

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Message Posted: Dec 7, 2014 3:08:50 PM

Higher octane was never designed to save fuel, it's designed for high compression engines. If your owners manual doesn't suggest it, don't use it.
mybigtruck
Champion Author San Jose

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Message Posted: Dec 7, 2014 2:14:40 AM

neither are true. the only benefit is bumping up gas company profits if your car doesn't need it
BCNU
Champion Author British Columbia

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Message Posted: Dec 6, 2014 4:23:13 AM

no
GasMiser718
Champion Author Detroit

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Message Posted: Dec 6, 2014 1:00:42 AM

No
hoopitup2000
Champion Author Virginia

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Message Posted: Nov 30, 2014 11:47:14 AM

No, it doesn't help fuel economy
dontuknowOH
Champion Author Ohio

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Message Posted: Nov 30, 2014 7:35:59 AM

Only like if it costs more, I would use less of it, and I realize the difference, so I don't, and my vehicle doesn't mind.
RalphHightower
Champion Author South Carolina

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Message Posted: Nov 30, 2014 7:26:14 AM

no
Alexi7
Champion Author Ohio

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Message Posted: Nov 30, 2014 1:11:53 AM

Higher octane doesn't save you fuel, only takes advantage of an engine's higher compression ratio. Won't hurt today's motors; just an unnecessary expense.
Mizzer1
Champion Author Worcester

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Message Posted: Nov 30, 2014 12:22:09 AM

no
RealtorJeff
All-Star Author San Diego

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Message Posted: Nov 29, 2014 6:38:30 PM

No, not worth the extra cost
JohnCur
All-Star Author New Jersey

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Message Posted: Nov 29, 2014 6:05:54 PM

I used to have a 1987 Cutlass that actually got significantly better mileage with 89 octane. It was a push economy wise but I thought the better fuel was good for the engine.
some new cars are now coming out recommending 89
redfish67
Champion Author Dallas

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Message Posted: Nov 29, 2014 2:27:58 PM

waste of money
GasMiser718
Champion Author Detroit

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Message Posted: Nov 29, 2014 12:22:39 PM

No
badbobKY
Champion Author Lexington

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Message Posted: Nov 21, 2014 6:34:21 AM

no
Boyrr
Champion Author Allentown

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Message Posted: Nov 21, 2014 6:27:59 AM

higher octane fuel is not a fuel saving device
GLM4205
Champion Author Toledo

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Message Posted: Nov 21, 2014 5:40:08 AM

What for?
twt
Champion Author Virginia Beach

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Message Posted: Nov 21, 2014 3:23:31 AM

Go with the suggested MFG octane.
poetdog73
Champion Author Toledo

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Message Posted: Nov 21, 2014 12:14:18 AM

no
Nuzan
Champion Author Nevada

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Message Posted: Nov 20, 2014 8:40:55 PM

No difference
zippok
Veteran Author Twin Cities

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Message Posted: Nov 20, 2014 11:43:09 AM

I find no difference unless I buy gas without 10 ethanol.
GasMiser718
Champion Author Detroit

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Message Posted: Nov 16, 2014 8:25:55 AM

I use what the manufacturer suggests. 87 octane
twt
Champion Author Virginia Beach

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Message Posted: Nov 14, 2014 3:16:05 AM

Go with the recommended octane.
PaylessKY
Champion Author Kentucky

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Message Posted: Nov 13, 2014 8:10:49 PM

No
one800rv
Rookie Author Florida

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Message Posted: Nov 9, 2014 1:26:15 PM

lowest octane rating where the engine still runs smooth. higher octane rating does not save fuel. even if it did it would not make up the difference in the higher cost of the fuel.
hoopitup2000
Champion Author Virginia

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Message Posted: Nov 9, 2014 11:44:39 AM

Only the uninformed would do this. . . . . .
forestghost07
Champion Author Miami

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Message Posted: Nov 8, 2014 11:30:26 PM

higher octane is fed to my 2 classic cars w/ high compression motors, to avoid spark knock (pinging), not for economy
hoopitup2000
Champion Author Virginia

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Message Posted: Nov 8, 2014 6:00:50 PM

Nope, doesn't help
LibertyGuardian
All-Star Author Arizona

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Message Posted: Nov 8, 2014 11:43:12 AM

"it's a myth"

.....

Exactly...debunked years ago the myth seems to live on as there's sufficient enough gullible lamebrains willing to blow their money on about anything anyone tells them to keep the myth alive and well.

As the old saying goes: "Sometimes you just can't fix stupid".
badbobKY
Champion Author Lexington

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Message Posted: Nov 8, 2014 10:33:00 AM

no
DaddyD302
All-Star Author Milwaukee

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Message Posted: Nov 8, 2014 3:35:40 AM

Even if it was true the higher cost offsets any savings.
speedfreek
Rookie Author Edmonton

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Message Posted: Nov 6, 2014 8:44:38 AM

I use higher octane than required to avoid ethanol in fuel. I then later had my ecm reprogrammed for higher octane though...
GasMiser718
Champion Author Detroit

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Message Posted: Nov 5, 2014 1:30:45 PM

No I put in what the book calls for.
GLM4205
Champion Author Toledo

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Message Posted: Nov 4, 2014 6:31:09 AM

No
Mikeyy1960
All-Star Author Cape Coral

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Message Posted: Nov 3, 2014 6:56:59 PM

neither is true. use what is recommended in manual
redfish67
Champion Author Dallas

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Message Posted: Nov 3, 2014 9:50:54 AM

it's a myth
hoopitup2000
Champion Author Virginia

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Message Posted: Nov 3, 2014 6:29:45 AM

Nope, will only make your wallet thinner.
mightymoes
Champion Author Boston

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Message Posted: Nov 3, 2014 1:56:57 AM

How many topics on this subject do we need! All major publications and manufacturers will tell you to put the recommended grade in your vehicle.
d_clark
Champion Author Grand Rapids

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Message Posted: Nov 2, 2014 9:38:44 PM

No.
badbobKY
Champion Author Lexington

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Message Posted: Nov 2, 2014 1:18:01 PM

no
carinthuist
Champion Author San Francisco

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Message Posted: Nov 2, 2014 12:06:51 PM

no
HideMKE
Champion Author Milwaukee

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Message Posted: Nov 2, 2014 11:19:06 AM

no
redfish67
Champion Author Dallas

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Message Posted: Nov 2, 2014 10:54:54 AM

no
GasMiser718
Champion Author Detroit

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Message Posted: Nov 2, 2014 10:29:27 AM

No.
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