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Author Topic: expensive gas better mpg? Back to Topics
boredwithnames
Rookie Author
Toronto

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Message Posted: Sep 29, 2013 7:17:37 PM

Hi:
I know this sounds illogical, but I seem to get better gas mileage using premium gas. My car doesn’t recommend it; not a performance, high end vehicle.
I usually used the same station, Petro, and usually use the cheapest gas grade.
Stopped at a station out of the ‘cheap’ stuff and put in the highest grade – and the mileage seems better.
Anomaly or has anyone else experienced this?
d
REPLIES (newest first) Post a Reply
cv
Champion Author Raleigh

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Message Posted: Nov 29, 2013 6:58:02 AM

It should not make any difference if the vehicle manual recommends regular.
ny10
Champion Author Virginia

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Message Posted: Nov 29, 2013 12:50:33 AM

i don't think so. it is not scientifically proven.
gvan
Champion Author Chicago

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Message Posted: Nov 23, 2013 5:06:05 PM

Myth: Premium gas gets better mileage than regular.

Facts: This myth goes back to the 1960s, Mazor says, when only premium gas had detergent, which helps clean the engine and improves its efficiency. However, now all fuel grades have detergents.
“Our recommendation is to read your owner’s manual,” says Mazor. “Ninety percent of cars on the road run on regular gasoline.” If you use premium when it isn’t required, he says, the only thing you’re draining is your wallet.

bubbavrs99
Rookie Author Cleveland

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Message Posted: Nov 22, 2013 9:01:29 AM

I never noticed a difference in my car's performance when using a higher grade gas.
dontuknowOH
Champion Author Ohio

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Message Posted: Nov 22, 2013 8:50:43 AM

Spending extra money often buys a person a better brain thought, only one at a time, as you please, now that's Great!
Dennis783
Champion Author Des Moines

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Message Posted: Nov 22, 2013 8:34:39 AM

I haven't seen any difference
rick_evans
Champion Author Boston

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Message Posted: Nov 19, 2013 5:35:23 PM

One tank is hardly a trend.
46chief
Champion Author Indiana

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Message Posted: Nov 14, 2013 3:47:38 PM

I can't believe I would get better gas mileage with higher octane gas. Wouldn't save anything because of the difference in price.
TomB2
Champion Author St. Louis

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Message Posted: Nov 14, 2013 11:42:31 AM

The only way premium fuel will result in better mileage on a vehicle designed to be run on regular is if youo have mechanical problems in the engine or a carbon buildup resulting in higher than design compression.
CColem2
Rookie Author Toms River

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Message Posted: Nov 14, 2013 10:43:26 AM

It may boost MPG slightly but in relation to cost it's very insignificant, you'll end up spending more if you buy into this myth.
MertieMan
Champion Author Lexington

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Message Posted: Nov 14, 2013 9:52:56 AM

By using premium gas when your vehicle does not call for it will eventually lead to your intakes becoming clogged and cleaning required.
MertieMan
Champion Author Lexington

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Message Posted: Nov 11, 2013 5:20:58 AM

All gas is still expensive, but using a higher octane rating than what your vehicle calls for is totally wasting money and it will not save you gas or get more miles per gallon.
eyegotgas2
Champion Author British Columbia

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Message Posted: Nov 8, 2013 7:10:03 AM

I don't think so either and even if you did the extra you have to pay for it would eat up the improvement.
dgsteven
Champion Author Los Angeles

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Message Posted: Nov 8, 2013 3:12:44 AM

no, I don' think so
hoopitup2000
Champion Author Virginia

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Message Posted: Nov 7, 2013 3:09:39 PM

A waste of money unless the car is designed to need a higher octane fuel. Mileage increase may occur in those vehicles, but shouldn't matter if the car is designed to run on 87.

[Edited by: hoopitup2000 at 11/7/2013 3:12:57 PM EST]
FahimAhmed
Rookie Author Toronto

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Message Posted: Nov 7, 2013 2:48:56 PM

I got a 'Honda crv 06' and occasionally I put Premium GAS in it. Manual says to use 87 or higher.
The extra pickup you get from Premium GAS, does it help with using up less gas and resulting spending less on GAS? I notice that less acceleration is needed when I use premium gas. And no, its not once, I noticed it when ever I put premium.
I am talking about a scenario where moderate braking is used and driving within city.
Please exclude driving on highway in this example.

Your thought is appreciated.
Fahim
PaylessKY
Champion Author Kentucky

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Message Posted: Nov 6, 2013 9:47:00 AM

If your vehicle uses 87 octane, you are wasting money on premium.
lwood655
Champion Author New Orleans

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Message Posted: Nov 6, 2013 9:18:03 AM

my milage stays the same
ricebike
Champion Author New Jersey

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Message Posted: Oct 28, 2013 9:27:11 AM

some vehicles that are high compression can perform better with premium (recommended from the owners manual)

it's ok to use regular octane in them due to the knock sensor

but if you do have turbo, you better be using premium all the time
Jmac2008
Champion Author Missouri

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Message Posted: Oct 28, 2013 12:44:49 AM

No - my mileage stays the same with 87 or 93 so I buy the 87
gas4u2
Rookie Author Houston

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Message Posted: Oct 27, 2013 3:50:20 PM

No, use what they recommend.
GLM4205
Champion Author Toledo

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Message Posted: Oct 27, 2013 2:49:14 PM

Not
the1roadhog
Champion Author Atlanta

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Message Posted: Oct 25, 2013 10:01:48 AM

Doubts abound.
MertieMan
Champion Author Lexington

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Message Posted: Oct 25, 2013 9:43:36 AM

This is strictly a figment of your vast imagination. If your vehicle says to run it on 87 octane, then that is what you should do.
ScottAdams5
Champion Author New York

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Message Posted: Oct 25, 2013 8:37:22 AM

High octane fuels have less energy in them, less Btu's, so they actually will lower fuel economy vs. regular gas.
carinthuist
Champion Author San Francisco

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Message Posted: Oct 24, 2013 8:14:16 PM

not really higher gas price
TomB2
Champion Author St. Louis

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Message Posted: Oct 24, 2013 1:21:47 PM

"ITAZ writes: with premium you get better millage due to very little ethanol.
______
I see no support for this, at least in the US. Premium will usually have the same content of ethanol to promote more complete combustion. At the present time, I continue to believe there is no difference in ethanol content as a function of octane grade."

The minimum amount of ethanol is gas is 10%, there are no varying amounts less than 10%. There are some stations, however, that sell gas without ethanol usually in the premium grade. Gas of any octane level with no ethanol will provide better gas mileage than gas with ethanol due to gasoline having more BTUs per gallon than ethanol.
Houckster
Champion Author Atlanta

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Message Posted: Oct 19, 2013 2:47:22 PM

ITAZ writes: with premium you get better millage due to very little ethanol.
______
I see no support for this, at least in the US. Premium will usually have the same content of ethanol to promote more complete combustion. At the present time, I continue to believe there is no difference in ethanol content as a function of octane grade.

If you have some links to bolster your argument, I'd like to see them.
itaz
Rookie Author Ontario

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Message Posted: Oct 19, 2013 2:28:11 PM

with premium you get better millage due to very little ethanol.
rick_evans
Champion Author Boston

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Message Posted: Oct 19, 2013 9:13:43 AM

"Stopped at a station out of the ‘cheap’ stuff and put in the highest grade – and the mileage seems better. Anomaly or has anyone else experienced this?"

I wouldn't conclude anything based on a single fill-up.

Absent your showing your records of fill-ups and mpg or liters/100 mile calculations who knows what your statement " ... the mileage seems better." means? I track my mpg on fuelly.com and the numbers fluctuate quite a bit with changes in city/highway driving and weather.
dontuknowOH
Champion Author Ohio

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Message Posted: Oct 19, 2013 8:59:36 AM

I goofed ! 87 reg. would be correct for me, I hit the wrong key, guess I didn't get my break nap, hitting the wrong key is "normal" for me say Her(the Wife).....
MertieMan
Champion Author Lexington

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Message Posted: Oct 19, 2013 8:46:22 AM

You positively need to burn only what the vehicle manufacturer recommends in the tank, and in most cases that is only 87 octane. Using higher octane saves you nothing but makes your wallet leak extensively for nothing. Higher octanes run hotter and can damages your intakes in the process.
dontuknowOH
Champion Author Ohio

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Message Posted: Oct 14, 2013 12:59:22 PM

No knocks, pings, or dirty sooty tail-pipes, starts runs fine, an no performance problems on 97 reg. even all brands E-10 works.!!! Keep my fuel filler area clean of any foreign debris, no problems only sensors do go bad over time, like batteries, wiper blades, filters, and ordinary stuff.
namzza6310
Champion Author Milwaukee

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Message Posted: Oct 14, 2013 11:37:12 AM

Don't believe that you would get better mileage and if you did you would have to get a pretty good bump in mileage to offset the additional cost.
atdes
Rookie Author San Jose

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Message Posted: Oct 14, 2013 9:50:46 AM

no
Camry05
All-Star Author Indiana

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Message Posted: Oct 14, 2013 9:08:18 AM

no
stonejd
Champion Author Illinois

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Message Posted: Oct 7, 2013 3:46:25 AM

Think whatever gas rated for your car is the best for it. 87 is 87
hoosh13
Champion Author Vancouver

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Message Posted: Oct 6, 2013 3:19:12 PM

No
forresj
Champion Author Wilmington

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Message Posted: Oct 6, 2013 10:11:45 AM

delusional
OilerFan
Champion Author Tulsa

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Message Posted: Oct 6, 2013 9:48:38 AM

Premium might give better mpg, but I have calculated cost per mile on my vehicles, and I have found that the increased mpg on my vehicles does not make up for the additional cost.
Now if any of them were cars with high compression engines, then the premium would definitely be a better cost per mile.
ZZZoop
Champion Author Virginia

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Message Posted: Oct 6, 2013 8:39:59 AM

>>I know this sounds illogical,...<<

Don't ignore the important clues in life.
Gas_Buddy
Champion Author Maryland

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Message Posted: Oct 4, 2013 7:53:53 PM

"Stopped at a station out of the ‘cheap’ stuff and put in the highest grade – and the mileage seems better."

Considering that you probably still had some of the "cheap" stuff in your gas tank, and that, based on what you wrote, it was a one time use of premium, then yes, it's an anomaly or a simple change of driving habit or driving condition for that particular tank of gas, or it could be (as you didn't tell us you performed fuel testing) simple perception.

Until you tell us more about what you're driving, the car and and other automotive information, what you fuel economy you normal get and what you got this time, and how you came up with your "testing results", other than "...the mileage seems better", then all it can be is a simple one time "it seems". You didn't even say that "it is", you said "it seems". Sorry, you gave too little information for a good response to your question other than no, "expensive gas" is not better "mpg", expensive gas is simply more expensive than less expensive gas.

Houckster
Champion Author Atlanta

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Message Posted: Oct 4, 2013 3:34:17 PM

Settle the matter for yourself. Run premium in your car for several tankfuls until you have a good baseline for mileage with premium. Then let the tank get real low and fill up with regular and use that for several tankfuls. Compare the CPM with each. Compare the mileage. My guess is that there is not enough, if any, increase in mileage with premium to justify the increased expense.
hummingbirdBC
Rookie Author Abbotsford

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Message Posted: Oct 4, 2013 2:39:03 PM

I've never tried it only because it is so expensive to fill up as it is. After reading comments here, I probably won't. Not worth it I figure. Gas companies already charge waaay too much.
gvan
Champion Author Chicago

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Message Posted: Oct 4, 2013 2:27:13 PM

Here's another opinion:

Myth: Premium gas gets better mileage than regular.
Facts: This myth goes back to the 1960s, Mazor says, when only premium gas had detergent, which helps clean the engine and improves its efficiency. However, now all fuel grades have detergents.
“Our recommendation is to read your owner’s manual,” says Mazor. “Ninety percent of cars on the road run on regular gasoline.” If you use premium when it isn’t required, he says, the only thing you’re draining is your wallet.
TomB2
Champion Author St. Louis

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Message Posted: Oct 4, 2013 1:23:16 PM

I know of a few stations where if you buy Premium gas, you are getting ethanol free gas. I suspect the OP has run into this unknowingly and got better mileage and thinks it's because of the higher octane.
PaylessKY
Champion Author Kentucky

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Message Posted: Oct 4, 2013 11:04:50 AM

The manual for my car states 87 or higher. I use 87 octane. The times used premium, it made no difference in fuel economy.
dassfg
Champion Author Fort Worth

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Message Posted: Oct 4, 2013 8:16:50 AM

Some cars improve during summer blend by moving up to mid-grade or premium
dv8jane
Veteran Author Chicago

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Message Posted: Oct 4, 2013 8:12:49 AM

No difference.
WEPSMAN
Champion Author South Dakota

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Message Posted: Oct 4, 2013 7:52:12 AM

I ran more expensive gas in my truck and gained 10-15% in mileage. It paid for itself. Some vehicles require higher octane fuel to run right.
Dennis783
Champion Author Des Moines

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Message Posted: Oct 3, 2013 7:46:17 AM

You might get better gas mileage but is it enough to offset the increase in price? Here you would pay 30 to 50 cents more, burt I doubt it will improve your gas mileage by 15% to break even.
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