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Author Topic: Do you get better gas mileage with regular, mid-grade, or pemium Back to Topics
blckwolf
All-Star Author
North Carolina

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Message Posted: Mar 17, 2013 2:45:17 PM

I recently started testing the difference between putting mid-grade vs. premium in my motorcycle. I've noticed a definite difference in mileage, to the tune of 4-6 more MPG on Premium vs. Mid-Grade. In fact, even with the higher price per gallon of Premium, I'm saving money - about $1.50/100 miles by using premium over mid-grade.

Have you tried this yet? If so, what has your experience been? Post your calculations and let us know.

Formula (MILES / MPG * COST = COST/100 Miles@ xx/MPG)

GRADE MPG COST MILES
Premium: 36-38 $4.04 100 miles. Cost of fuel: $10.94/100 miles @ 37/MPG
Mid-grade: 32-34 $3.86 100 miles. Cost of fuel: $11.72/100 miles @ 33/MPG
REPLIES (newest first) Post a Reply
PatAZ
Champion Author Tucson

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Message Posted: Dec 23, 2013 2:12:03 PM

My vehicle calls for premium so that is all I use.
PassmyGas
All-Star Author North Carolina

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Message Posted: Dec 21, 2013 10:24:41 AM

no
PassmyGas
All-Star Author North Carolina

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Message Posted: Dec 20, 2013 8:07:23 PM

not really
Camry05
All-Star Author Indiana

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Message Posted: Dec 20, 2013 5:12:40 PM

never tried midgrade or premium
thirstyV8suv
All-Star Author Columbus

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Message Posted: Dec 15, 2013 8:44:17 PM

Can anyone comment if there is any difference in the % of ethanol by volume between 87 and 93 octane?
stonejd
Champion Author Illinois

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Message Posted: Dec 7, 2013 12:10:22 AM

What ever the car is rated at.
ScottAdams5
Champion Author New York

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Message Posted: Dec 7, 2013 12:02:07 AM

Regular, as it has more Btu's.
PaylessKY
Champion Author Kentucky

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Message Posted: Dec 6, 2013 9:15:30 AM

I use regular 87. I don't get any better or less using premium. I did have a 1994 Nissan Altima that using premium the fuel economy dropped.
Dennis783
Champion Author Des Moines

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Message Posted: Dec 6, 2013 8:20:54 AM

I get better mileage with regular since it has no ethanol, but since midgrade is 13cents cheaper it usually costs less per mile
traffic cop
Champion Author Boston

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Message Posted: Dec 6, 2013 12:01:13 AM

I wouldn't waste my money on the higher grades. Talk about diminishing returns!
PatAZ
Champion Author Tucson

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Message Posted: Dec 5, 2013 10:24:31 AM

Better with premium for me.
GLM4205
Champion Author Toledo

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Message Posted: Dec 4, 2013 5:20:59 AM

I do not use mid range gas...
ny10
All-Star Author Virginia

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Message Posted: Dec 2, 2013 10:15:35 AM

no, and i don't think it is a fact to gain better mileages by using higher octane
Guile69
Rookie Author KW

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Message Posted: Sep 19, 2013 4:59:47 PM

No
GLM4205
Champion Author Toledo

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Message Posted: Sep 12, 2013 5:35:15 AM

You are only supposed to run in the car what the manufacturer recommends and most vehicles on the road now only require 87 octance gasoline.
dontuknowOH
Champion Author Ohio

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Message Posted: Sep 10, 2013 3:06:42 PM

Reply to bickwolf: Way back before E-10 I rode an English designed motorcycle after it was hopped to near 11:1 compression along with cam changes R-grind tappets, ported/polished chambers, cold plugs, 3 angle valve, ETC and other modes for street use.

I then hunted to find proper octane fuel at many different suppliers to not harm the air-cooled engine, later after being dissatisfied with the many inflated bragged about brands available for premium/super premium. I did find by surprise a brand suitable with no problems...

You mentioned your Hog, I assume a modern H/D motorcycle, It probably has at least(9:1 or more compression if not hopped up, my currant sports bike runs 10:5:1 on reg. but doesn't like E-10 added but it's liquid cooled and more stable, really likes a mid grade for hammering.

Air cooling V/S liquid really makes a difference related to tuning the carbs/pipes/plugs/timing advance. Modern EFI is better at balancing the fuel grades, more economical, less idle cost and accommodate a higher compression for more HP on a lower grade of fuel, variable cam timing I don't know about on H/D.'s....

About the compression level, most any owners manual should give those engine specs. Owners may not normally understand those but they often know more about their cell phone functions or TV remotes operation, that's a shame because vehicle maintenance is costly, some routine repairs are just needed know matter what one owns/drives/rides.... HAGDay!
fkkf92
Champion Author Toronto

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Message Posted: Sep 10, 2013 11:50:02 AM

regular
randy3116
All-Star Author Tennessee

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Message Posted: Sep 10, 2013 9:10:46 AM

mine requires premium
justinemt14
Champion Author Philadelphia

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Message Posted: Sep 10, 2013 5:13:18 AM

Regular.
blckwolf
All-Star Author North Carolina

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Message Posted: Mar 22, 2013 4:54:51 PM

dontuknowOH: Now you're getting technical! Most people don't know how to check their compression level, let alone what it is! Also, unfortunately, I currently don't have the means to check my compression level on my vehicles. Last, none of my vehicles are turbo either.

My wife's Lexus does use premium per the manuf. recommendation, but I have put mid-grade in it w/o ill effect (I put mid-grade in her Infinity too all the time when we had that car and it never affected the engine.) I have not tested her mileage performance yet (she drives it for the most part, and doesn't really care how much money she spends on gas - go figure).

In most cases, I used to tend to think that manuf. claims of needing to use "Premium only" were overstated - but now that I've been testing the effect of running lower grade on my Hog, I'm beginning to think that maybe they're not so full of it after all...
DLL66
Veteran Author Nashville

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Message Posted: Mar 22, 2013 2:13:15 PM

Never tried this, but wonder about it. I just use what the manufacture calls for. My F-150 it gets 87, the BMW gets 89, the Harley get 93.
dontuknowOH
Champion Author Ohio

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Message Posted: Mar 22, 2013 9:27:57 AM

One should check their car manual first.Later what is the compression ratio? Then know if your vehicle has variable cam automatic timing... Older engines did not. They had a setting fitted only for wear. Others not.

Also if that engine is a turbo most likely it needs the higher grades for performance due to compression/boost pressure with variable cam timing. Special engines are designed for the major rpm ranges they will operate in whether for work or competing.

Correct combustion temps for what each engine is designed for can relate to the proper fuel used or mileage/performance can suffer or prosper. If my CELs stay off I continue doing what I have in the past. Engine's tastes are different from Humans! Really..... CELs are touchy.....
IAMCANADIAN73
Champion Author Ontario

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Message Posted: Mar 22, 2013 8:47:49 AM

Maybe
IAMCANADIAN73
Champion Author Ontario

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Message Posted: Mar 22, 2013 8:47:40 AM

Have no idea
blckwolf
All-Star Author North Carolina

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Message Posted: Mar 22, 2013 8:07:28 AM

Arnsaks: While that would normally be the case, I am curious if vehicles that run 87 get better mileage on higher octane, since it contains more energy.
Arnsaks
Veteran Author Indiana

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Message Posted: Mar 22, 2013 1:18:42 AM

Whatever grade of fuel your car is designed to burn, that's what grade will give you the best mileage.
blckwolf
All-Star Author North Carolina

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Message Posted: Mar 21, 2013 8:11:44 PM

MertieMan: I'm sorry, but that is completely wrong. If any grade of fuel that you buy at a gas station damages your car, then it's because the gas station screwed up and got something in the gasoline, the engine in your car was faulty, or you bought a lemon. Now, on HIGH OCTANE ONLY vehicles that state that your vehicle should ONLY have Premium, you can safely run Mid-grade, or even regular, but only for a short time. The lower grade fuel should not damage your engine in the short term, but I wouldn't recommend going down more than one grade level: i.e.: Going down to mid-grade from premium should be just fine, but going to regular will cause knocking or pinging in your premium only vehicle. Also, your gas mileage will probably suffer, and you won't have the power/acceleration you normally do.
weddy11
Champion Author Phoenix

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Message Posted: Mar 21, 2013 9:45:53 AM

I never noticed a difference with my gas hog vehicles. Now that I have a fuel eoonomy car,I may try it see if there is a difference.
Dennis783
Champion Author Des Moines

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Message Posted: Mar 21, 2013 7:37:22 AM

here you get better mileage with regular since it doesn't have ethanol
MertieMan
Champion Author Lexington

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Message Posted: Mar 21, 2013 5:20:38 AM

If your vehicle calls for 87 octane, you will NOT get any better gas milage running a higher octane rating, and you may do damage to your intakes in the process.
dontuknowOH
Champion Author Ohio

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Message Posted: Mar 21, 2013 12:42:25 AM

A few day back the temps got toward 50-60 F derees,my vehicle mileage improved very noticably.No accual checks but evident! Reg grade...
blckwolf
All-Star Author North Carolina

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Message Posted: Mar 20, 2013 8:33:07 PM

So far, I have seen no significant improvement in my mileage (actually, I take that back - my first 60 miles or so on my new tires netted me a 4MPG gain, but later toady, I started riding like the devil and that probably dropped it back some...) with the new tires I mentioned in my earlier post. If I ride, I'll take it a little easier and see what happens.
carinthuist
Champion Author San Francisco

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Message Posted: Mar 20, 2013 7:53:37 PM

premium gas better mpg
geno700
Veteran Author British Columbia

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Message Posted: Mar 20, 2013 10:14:57 AM

premium gave better mileage. but could not afford it
JustMe10
All-Star Author Richmond

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Message Posted: Mar 20, 2013 7:34:47 AM

I can only afford regular, so Regular.
DanFMA
Champion Author Massachusetts

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Message Posted: Mar 20, 2013 6:54:30 AM

Regular.
dasAuto
Champion Author Saskatchewan

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Message Posted: Mar 20, 2013 12:31:13 AM

I tried that experiment the last two years with my car. There was no improvement in mileage. I got better mileage by buying regular-gasoline from different brands (i.e. the fuel was always a mix from low-end retailers to high end).
pawnkingfour
Champion Author Georgia

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Message Posted: Mar 19, 2013 7:25:18 PM

Hhhmnnn! I haven't tried measuring MPG, although I always pump in the recommended regular octane by the manufacturer. I may try that.
PhilnTX
All-Star Author Dallas

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Message Posted: Mar 19, 2013 6:36:05 PM

I typically get 1-2 MPG better when running ethanol free, 89 octane in my 2010 Silverado.
E10 87 octane gives me my lowest MPG (I don't use E85)
tdioiler
All-Star Author Detroit

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Message Posted: Mar 18, 2013 9:22:12 PM

Some OEM's specify premium fuel for their EPA tags to match MPG. It was a big ploy by Toyota FX series to scream they beat the Jeep TJ in economy... until you read the fuel cap "Premium Only". Fill it with regular like the Jeep and you get less MPG.

blckwolf
All-Star Author North Carolina

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Message Posted: Mar 18, 2013 7:27:53 PM

My mileage is somewhat low for my motorcycle because 1) my bike is carbureted 2) I have a large Kuryakyn ProSeries Air Cleaner 3)Sampson Street Sweeper pipes and 4) a windshield that does create drag (reduces mileage based on my observations by about 1-2 MPG). I'm sure it could stand a tune up tweak and get better mileage.

Carbureted bikes get a little lower mileage than FI bikes (my last FI got 42 MPG on average.)

I just put new tires on today, so maybe my mileage will go up - we'll see. I will continue to test and post here. I will also run some tests on my truck (I usually use regular in it).

Blckwolf
jnfrancois
Rookie Author Orlando

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Message Posted: Mar 18, 2013 9:20:49 AM

don't know
Shamyne
Rookie Author Orlando

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Message Posted: Mar 18, 2013 9:20:33 AM

not sure
ricebike
Champion Author New Jersey

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Message Posted: Mar 18, 2013 8:39:41 AM

. duplicate post

[Edited by: ricebike at 3/18/2013 8:40:17 AM EST]
ricebike
Champion Author New Jersey

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Message Posted: Mar 18, 2013 8:39:41 AM

most motorcycles requires premium

but i got away with regular

of course, my 250cc engine has decent mileage to begin with (65-70 MPG)

[Edited by: ricebike at 3/18/2013 8:41:09 AM EST]
OceanArcher
Champion Author Mississippi

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Message Posted: Mar 18, 2013 8:35:16 AM

I've never tried a test such as you outline. I'll watch/listen for your updates
rick_evans
Champion Author Boston

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Message Posted: Mar 18, 2013 7:28:55 AM

I'm surprised at the low MPG of your bike. My Corolla routinely gets 37 mpg around town and 40 mpg on the highway using regular 87. For the heck maybe I'll try experimenting on a long trip.

[Edited by: rick_evans at 3/18/2013 7:30:08 AM EST]
MertieMan
Champion Author Lexington

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Message Posted: Mar 18, 2013 5:14:21 AM

You are only supposed to run in the car what the manufacturer recommends and most vehicles on the road now only require 87 octance gasoline.
jes
Champion Author Pennsylvania

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Message Posted: Mar 18, 2013 4:57:51 AM

My Chevy Aveo requires regular 87 octane and that's all it's ever had.
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