Not Logged In Log In   Sign Up   Points Leaders
Follow Us    3:45 AM

Message Forum - Read Message

Category: Fuel Economy > Topics Add to favorite topics   Post new topicPost New Topic
Author Topic: does anyone use higher octane to save fuel? Back to Topics
groddy86

Rookie Author
Richmond

Posts:5
Points:2,300
Joined:Apr 2012
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
Profile Pic
bikemannc
Rookie Author North Carolina

Posts:63
Points:23,910
Joined:Oct 2013
Message Posted: Jan 2, 2014 12:35:07 PM

how can paying much more for higher octane save you gas money? ahem...you are paying more for your fuel.
Profile Pic
PaylessKY
Champion Author Kentucky

Posts:10,430
Points:1,918,775
Joined:Oct 2008
Message Posted: Jan 2, 2014 11:23:47 AM

No, I use 87 octane.
Profile Pic
twt
Champion Author Virginia Beach

Posts:11,425
Points:1,326,135
Joined:Mar 2005
Message Posted: Jan 2, 2014 3:40:53 AM

I use what the manufacturer, recommends.
Profile Pic
carinthuist
Champion Author San Francisco

Posts:3,846
Points:628,100
Joined:Mar 2012
Message Posted: Jan 1, 2014 11:35:55 PM

Yes have used on older car for more mpg
Profile Pic
Karisholman
Veteran Author Nevada

Posts:452
Points:392,230
Joined:Oct 2012
Message Posted: Jan 1, 2014 10:35:08 PM

I like to track my mpg and try higher octane and keep track. I believe it does make a difference in my BMW X5 and our Honda CRV. The dealer of the Honda swore it wouldn't make a difference. I just tracked it myself and tried. The proof is in the pudding.
Profile Pic
ScottAdams5
Champion Author New York

Posts:1,159
Points:427,810
Joined:Jan 2012
Message Posted: Jan 1, 2014 11:37:21 AM

Higher octane fuels deliver less fuel economy, not more.
Profile Pic
borsht
Champion Author Oakland

Posts:2,405
Points:524,495
Joined:Aug 2012
Message Posted: Dec 31, 2013 12:23:50 AM

One doesn't buy higher octane to save on fuel. One buys higher octane to prevent detonation in high compression engines.
High compression ratios or turbocharged cars require higher octane than a standard engine does.
If your car is running fine on 87 Octane, buying higher octane does not provide greator fuel econnomy.
Profile Pic
carinthuist
Champion Author San Francisco

Posts:3,846
Points:628,100
Joined:Mar 2012
Message Posted: Dec 27, 2013 1:01:12 AM

No
Profile Pic
dv8jane
Veteran Author Chicago

Posts:301
Points:137,400
Joined:Mar 2012
Message Posted: Dec 26, 2013 9:07:52 AM

Unless the owner's manual states that premium is required, it is just a waste of money.
Profile Pic
BartandLisa
Champion Author Newfoundland

Posts:3,845
Points:752,220
Joined:Feb 2012
Message Posted: Dec 25, 2013 12:52:56 PM

No
Profile Pic
stonejd
Champion Author Illinois

Posts:1,188
Points:487,850
Joined:Feb 2012
Message Posted: Dec 7, 2013 12:10:39 AM

No
Profile Pic
ScottAdams5
Champion Author New York

Posts:1,159
Points:427,810
Joined:Jan 2012
Message Posted: Dec 7, 2013 12:01:15 AM

Higher octane fuels deliver less fuel economy, not more.
Profile Pic
outlaw329
Champion Author Austin

Posts:9,114
Points:1,662,870
Joined:Aug 2008
Message Posted: Dec 5, 2013 9:52:07 PM

Waste of money
Profile Pic
randy3116
All-Star Author Tennessee

Posts:947
Points:314,395
Joined:Oct 2012
Message Posted: Dec 5, 2013 8:09:25 AM

my car requires premium
Profile Pic
hoopitup2000
All-Star Author Virginia

Posts:764
Points:206,765
Joined:Jul 2013
Message Posted: Dec 5, 2013 7:54:40 AM

Unless the owners manual states that premium is required, it is just a waste of money.
Profile Pic
contiki
Champion Author Ontario

Posts:20,345
Points:860,765
Joined:Sep 2008
Message Posted: Dec 5, 2013 7:43:04 AM

Putting higher octane in a car or truck that is meant to use regular gas is wasting your money and could also do harm to your vehicle..........

You won't save on fuel either because the higher expense won't justify the savings in fuel, if there is any............

[Edited by: contiki at 12/5/2013 7:44:48 AM EST]
Profile Pic
pinbuster2005
Champion Author New Hampshire

Posts:5,395
Points:1,597,520
Joined:Oct 2005
Message Posted: Dec 5, 2013 2:47:24 AM

oilerfan - That is true. in order to make up the price difference between regular & plus or super you'd have to gain a lot in fuel economy.

for example if you get 30 mpg with regular at $3.30/gal that is a cost per mile of 11.0 cents.

Going by a 20 cent a gallon margin between grades (seems to be the average) To just break even with mid grade at $3.50/gal you'd have to get 31.82 mpg or a 6% increase in fuel economy.

To break even with super at $3.70/gal you'd have to get 33.64 mpg or a 12.1% increase in fuel economy.

Granted When I had my '85 escort and my '84 aries wagon with carborated engines my fuel economy was 20% higher with super in the escort and 20.6% higher in the aries than it was running regular but also at that time the difference between the prices was only about 15-20 cents not 40-50 cents like it is today so it made running super worth it.

Profile Pic
Boyrr
Champion Author Allentown

Posts:16,559
Points:3,490,395
Joined:May 2004
Message Posted: Dec 4, 2013 12:25:27 PM

i use it because the machine needs it
Profile Pic
metalhat73
Champion Author Wilmington

Posts:11,350
Points:494,005
Joined:May 2012
Message Posted: Dec 4, 2013 10:37:14 AM

2011 Insight. I tested Shell premium and watched my MPG drop some 10percent and the car was still slow as hell. Just a waste of money. Running on regular with 141,000 miles and engine is running smooth.
Profile Pic
thebrohta167
Champion Author New Jersey

Posts:1,794
Points:280,535
Joined:Nov 2010
Message Posted: Dec 4, 2013 10:27:39 AM

use it for performance, which happens to improve efficiency
Profile Pic
the1roadhog
Champion Author Atlanta

Posts:11,186
Points:2,382,775
Joined:Jun 2007
Message Posted: Dec 4, 2013 9:11:11 AM

not needed in my unit
Profile Pic
OilerFan
Champion Author Tulsa

Posts:15,550
Points:2,689,405
Joined:Aug 2005
Message Posted: Dec 4, 2013 7:50:41 AM

I have measured and found that I get slightly better mileage with the higher grade. However, if I calculate my cost per mile, the higher grade is a net loss, because whatever gain in mileage, is lost (and then some) by the higher price. Economically, I'm better off with the lower octane.
Profile Pic
pinbuster2005
Champion Author New Hampshire

Posts:5,395
Points:1,597,520
Joined:Oct 2005
Message Posted: Dec 4, 2013 3:32:01 AM

Back with the old carborated engines I'd agree that super would give better mileage than regular. When I had a 1985 Ford Escort I would average 42 mpg with super and only 35 mpg with regular. When I had a 1984 Aries wagon I used to average 35 mpg with super and only 29 mpg with regular. But also back then the difference in price was only about 15 cents a gallon not 20-40 cents like it is today. But even at today's prices difference that escort would have cost 8.809 cents per mile to run super ($3.70/gal price) and 9.514 cents per mile to run regular ($3.33/gal price) and the Aries would have cost 10.571 cents a mile to run super and 11.482 cents a mile to run regular so it would have been worth it to run super in those automobiles.

But with todays fuel injected engines I've found that the automobiles that call for 87 octane fuel get lower mileage with the higher grades. I found this out the first time by accident when I needed gas (on empty) and the station near my house was out of regular and sold super at the regular price. I had a 1995 ranger pick-up at the time and I normally averaged 28 mpg with regular and only got 23 out of that tank of super. So just to make sure it wasn't a fluke thing I tried it with three more tanks and the overall average for those three tanks was 23.4 mpg and that was doing my regular driving. That's a 16.4% drop in fuel economy. I've tried this with other fuel injected automobiles I've owned and have found the same 10-20% drop in fuel economy. If I'm near empty now and the station I come to for gas is out of regular (rare but does happen from time to time) and they are selling super for the regular price i'll put in only $10-20 to shut the low fuel light off and get fill up at a different brand station that is in my top 3 for fuel mileage & cost per mile to run.

So personally I would say Unless it says in your owner's manual to use the higher octane fuel I wouldn't use it because it's not going to save you anything.

[Edited by: pinbuster2005 at 12/4/2013 3:36:46 AM EST]
Profile Pic
Houckster
Champion Author Atlanta

Posts:10,674
Points:747,670
Joined:Sep 2003
Message Posted: Dec 3, 2013 5:23:12 PM

SUPERMAN1AZ writes: I have been told by a chief service manager that high octane gas burns faster and that you get better mileage because of the greater power in the gas to fire the pistons. It does cost more, though.
_____
Not true. Premium fuel has no more energy content than regular and that means that it will NOT provide better mileage. It has a different formula that allows it to withstand the higher cylinder heat and pressure of a high compression engine. For engines designed only for 87 octane fuel (regular), it provides no advantage at all.

In the last few years, engines designed to run on a range of octane fuels have reached the marketplace. In this case you can get better power and mileage but it's unlikely that the fuel efficiency increase will give a better fuel CPM than regular given the 30-40 cent price differential. The article I've linked here advises that for a car that can use either regular or premium, it takes about 1/2 second less time to reach 60 MPH when premium fuel is used.

Regular vs Premium Fuel

[Edited by: Houckster at 12/3/2013 5:23:39 PM EST]
Profile Pic
stonejd
Champion Author Illinois

Posts:1,188
Points:487,850
Joined:Feb 2012
Message Posted: Dec 2, 2013 2:28:06 AM

Most vehicles that are rated at 87 will more than likely not see better GAS MPH utilizing 89/93 octane. Not worth the added FEE to pay more than what the car is supposed to use.
Profile Pic
pawnkingfour
Champion Author Georgia

Posts:1,746
Points:422,670
Joined:Dec 2011
Message Posted: Dec 1, 2013 11:25:01 PM

My vehicle requires regular gasoline.
Profile Pic
superman1AZ
Rookie Author Phoenix

Posts:38
Points:281,490
Joined:Mar 2011
Message Posted: Dec 1, 2013 10:20:58 PM

I have been told by a chief service manager that high octane gas burns faster and that you get better mileage because of the greater power in the gas to fire the pistons. It does cost more, though.
Profile Pic
ny10
All-Star Author Virginia

Posts:809
Points:443,645
Joined:Mar 2011
Message Posted: Dec 1, 2013 3:10:05 PM

use higher octane only if a car requires it
Profile Pic
rick_evans
Champion Author Boston

Posts:5,522
Points:1,364,855
Joined:Aug 2005
Message Posted: Nov 19, 2013 5:31:07 PM

Use higher octane if the car maker calls for it.
Profile Pic
jl1rp
Champion Author New Hampshire

Posts:3,711
Points:694,630
Joined:May 2012
Message Posted: Nov 16, 2013 12:41:09 AM

no
Profile Pic
RSMoonWalks
Rookie Author Durham

Posts:44
Points:105,935
Joined:May 2004
Message Posted: Nov 15, 2013 8:17:17 AM

myth.... at least for my 2013 KIA
I put 93 in it and got a decress on mileage. from 29.2 down to 25.6.
next tank put 87 in mileage went back to 29.2 avg.
Profile Pic
WilhamClouse
Champion Author Calgary

Posts:1,502
Points:300,840
Joined:Jun 2013
Message Posted: Oct 29, 2013 11:37:34 PM

I don't.
Profile Pic
Boyrr
Champion Author Allentown

Posts:16,559
Points:3,490,395
Joined:May 2004
Message Posted: Oct 28, 2013 5:21:15 PM

Use the fuel your machine was designed for
Profile Pic
cujo1977
Champion Author Nashville

Posts:1,302
Points:238,550
Joined:Apr 2013
Message Posted: Oct 27, 2013 11:33:29 AM

N
Profile Pic
the1roadhog
Champion Author Atlanta

Posts:11,186
Points:2,382,775
Joined:Jun 2007
Message Posted: Oct 27, 2013 10:11:36 AM

Jive talkin'
Profile Pic
contiki
Champion Author Ontario

Posts:20,345
Points:860,765
Joined:Sep 2008
Message Posted: Oct 27, 2013 7:17:41 AM

never.........myth.......
Profile Pic
Boyrr
Champion Author Allentown

Posts:16,559
Points:3,490,395
Joined:May 2004
Message Posted: Oct 27, 2013 6:19:49 AM

Nope
Profile Pic
ScottAdams5
Champion Author New York

Posts:1,159
Points:427,810
Joined:Jan 2012
Message Posted: Oct 26, 2013 8:35:25 PM

No. It's a myth. Save your money.
Profile Pic
GrizzlyRaptor
Sophomore Author Sacramento

Posts:162
Points:21,045
Joined:Sep 2013
Message Posted: Oct 16, 2013 10:32:40 AM

Higher octane gasoline only gives you higher horsepower if you have a high compression engine. Otherwise, there's no benifit to it.
Profile Pic
GLM4205
Champion Author Toledo

Posts:5,532
Points:1,097,460
Joined:Dec 2010
Message Posted: Oct 14, 2013 5:42:56 AM

No
Profile Pic
Camry05
All-Star Author Indiana

Posts:731
Points:285,260
Joined:Apr 2012
Message Posted: Oct 12, 2013 8:42:01 PM

bad idea
Profile Pic
TomB2
Champion Author St. Louis

Posts:1,415
Points:217,600
Joined:Jul 2013
Message Posted: Oct 10, 2013 9:09:17 AM

Higher octane fuel burns more slowly and doesn't provide any better mileage or driveability.
Profile Pic
ScottAdams5
Champion Author New York

Posts:1,159
Points:427,810
Joined:Jan 2012
Message Posted: Oct 10, 2013 2:30:43 AM

Lower octane fuels have more energy in them, (Btu's), than higher octane fuels do, so lower octane fuels can provide better fuel economy than higher octane fuels do.
Profile Pic
borsht
Champion Author Oakland

Posts:2,405
Points:524,495
Joined:Aug 2012
Message Posted: Oct 9, 2013 5:26:56 PM

Octane rating is not a good factor in determining fuel economy.
If your engine is detonating, pinging, then by all means use higher octane. it will give you better economy on gasoline and the engine will last much longer.
But other than preignition, octane is not a reliable factor in measuring
economy.
For instance if you add ethanol to gasoline, the octane goes up and the economy goes down.
Profile Pic
contiki
Champion Author Ontario

Posts:20,345
Points:860,765
Joined:Sep 2008
Message Posted: Sep 30, 2013 6:26:27 AM

Another crazy idea here.........
Profile Pic
cv
Champion Author Raleigh

Posts:16,899
Points:3,604,455
Joined:Oct 2003
Message Posted: Sep 30, 2013 6:23:00 AM

Makes no difference in my vehicles.
Profile Pic
ace12012
Champion Author Phoenix

Posts:3,091
Points:585,765
Joined:Apr 2012
Message Posted: Sep 18, 2013 1:14:08 PM

no...it does not help.
Profile Pic
GrizzlyRaptor
Sophomore Author Sacramento

Posts:162
Points:21,045
Joined:Sep 2013
Message Posted: Sep 17, 2013 7:18:09 PM

High octane gasoline does not increase fuel mileage. It does not increase horsepower either unless the engine is tuned for it. In most cases, it is a waste of money.
Profile Pic
OilerFan
Champion Author Tulsa

Posts:15,550
Points:2,689,405
Joined:Aug 2005
Message Posted: Sep 17, 2013 9:36:00 AM

higher octane provides no gain unless it's a high compression engine, like those in older cars.
Profile Pic
forresj
Champion Author Wilmington

Posts:5,011
Points:878,580
Joined:May 2005
Message Posted: Sep 17, 2013 8:12:16 AM

R U on drugs?
Post a reply Back to Topics