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Author Topic: Premium vs Regular Gas? Back to Topics
MoneySaver1986

Rookie Author
Ottawa

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Message Posted: May 13, 2013 6:43:23 AM

Does it really matter if i give the car premium or reg gas?
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SammyDA
All-Star Author California

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Message Posted: Oct 14, 2013 2:52:39 PM

Regular
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jay93LA
Champion Author New Orleans

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Message Posted: Oct 2, 2013 7:51:02 AM

reg
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ricebike
Champion Author New Jersey

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Message Posted: Oct 2, 2013 6:10:38 AM

high compression engines or turbo/super charger powered engines need premium

most regular commuter vehicles takes 87 octane

manual/ or sometimes gas door/cap will state if higher octane is recommended
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no_whereman
Veteran Author California

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Message Posted: Oct 2, 2013 12:21:39 AM

I've been told your type of engine dictates what you put in it! Look to owners manuel!
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SpeedyGonzoMD
Champion Author Maryland

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Message Posted: Oct 2, 2013 12:04:01 AM

Most modern vehicle can adjust to run on regular (a Lexus for example). Best to use the recommended fuel. Better yet, buy a vehicle that recommends regular fuel.
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Boyrr
Champion Author Allentown

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Message Posted: Oct 1, 2013 12:21:15 PM

use what the mfg. recommends
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RalphHightower
Champion Author South Carolina

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Message Posted: Sep 28, 2013 6:10:41 AM

I use what's recommended or required for my car. In my case, premium is recommended.
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SammyDA
All-Star Author California

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Message Posted: Sep 27, 2013 5:55:55 PM

Amazing that in Corona CA prices range from $3.71 to $4.09 - That $.38 cents. In Brigeton N.J. range is from $3.34 to $3.41 that $.07 cents.
ASK WHY - OK - it's a farm area, and if you sold gas at a $.38 cent more price - YOU WOULD BE OUT OF BUSSINESS!!!!!!!!!!!!!!
Wake up and smell the gas CA. DO NOT BUY AT THE HIGH PRICE STATIONS!!!!!!!!!
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HotRod10
Champion Author Wyoming

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Message Posted: Sep 27, 2013 4:06:58 PM

The required octane level is dependent of the absolute compression of the engine, the maximum pressure developed in the cylinder. Lower octane fuel is more volatile, and thus more likely to spontaneously combust under pressure before the spark plug fires (preignition). This is what causes knocking or pinging. Most newer cars have a "knock sensor" that adjusts the ignition timing to alleviate the problem, but it results in poorer engine efficiency, and therefore lower mileage.

The absolute compression is a function of the compression ratio and the altitude. Because the air's thinner at higher altitudes, the absolute compression will be less for the same compression ratio. If you are near sea level (<1000ft), you should use at least the octane rating recommended by the car manufacturer. At 6000 ft where I live, I'm able to drop down a grade (2 octane points) in my vehicles. This is why 85 octane gas is mostly only available in the Rocky Mountain region.
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dvc2
Champion Author Oakland

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Message Posted: Sep 27, 2013 1:30:45 AM

Regular
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PaylessKY
Champion Author Kentucky

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Message Posted: Sep 26, 2013 1:31:29 PM

Regular
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fkkf92
Champion Author Toronto

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Message Posted: Sep 26, 2013 10:32:50 AM

rgular
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forresj
Champion Author Wilmington

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Message Posted: Sep 26, 2013 10:23:38 AM

Better think twice before taking advice from Hollierae. She mistakenly pumped diesel fuel into her yellow Camaro because she thought the yellow color pump handle was meant for her car.

Priceless.
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brazilianguy
Sophomore Author Orlando

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Message Posted: Sep 26, 2013 9:42:38 AM

regular
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stonejd
Champion Author Illinois

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Message Posted: Sep 26, 2013 8:05:56 AM

only use premium if it warrants it
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cv
Champion Author Raleigh

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Message Posted: Sep 26, 2013 6:36:17 AM

Regular works best for my vehicle.
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Houckster
Champion Author Atlanta

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Message Posted: Sep 25, 2013 12:50:30 PM

HOLLIERAE writes: Owners manuals are good to look at, but common-sense is even better. Talk to your dealer and service people. Ask them about the benefits of non-ethanol gas. Rely less on biased information in forums.
_____
Dealers and service technicians may or may not have good information. That depends on their training and experience. I've gotten good and bad advice from these sources. Forums often contain good info too because many posts are written by people who have experimented and learned some valuable information.

The best information comes from multiple sources. If you're hearing it from multiple sources, there's a good chance the information is good but in the end, you have to trust your own judgment.

In my own experience, I've run Plus fuel in my Ranger but that was when I was getting some knocking because I had some plugs that were a bit too hot. They were the recommended plugs for my engine but this is when you have to use your own judgment. I went to a colder plug and I was able to go back to regular. I don't get CELs and I pass my emissions tests.

[Edited by: Houckster at 9/25/2013 12:54:44 PM EST]
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dontuknowOH
Champion Author Ohio

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Message Posted: Sep 25, 2013 10:23:02 AM

Much has been said about fuel ratings concerning better driving city/hi-way mileage/performance, based on fuel personal experience use.

Even Winter/Summer blending or the plus/minus amounts of E-10, and then maybe say stale gas at least thinking that.

One thing I often consider is when Fall temps arrive, daily temps change for some drivers/vehicles along with tire pressures drop, going into the Winter season. The common automotive thermostat can get sluggish in it's operation of opening/closing but often not be a serious problem as yet.

If stuck open or shut serious problems show up quickly just like a battery going from average condition to worse when Fall temps, colder overnight mornings/evenings arrive. Still a daily driver vehicle may not give any warning of failure concerning a loss in mileage, the gains can always be noticed by many presumptuous reasons/new habits due to being more alert for fuel savings.

Really I'm saying battery condition, thermostats, tire pressure, and ambient seasonal temperature changes can be the real alerts toward mileage differences before the other vehicle conditions arrive slowly as problems.

How many times have someone said "and I just had that checked a week ago maybe!" to the tow-truck Guy, Smile.... for a Smile on a nice day!......

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Hollierae
Rookie Author Wisconsin

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Message Posted: Sep 25, 2013 9:43:56 AM

Owners manuals are good to look at, but common-sense is even better. Talk to your dealer and service people. Ask them about the benefits of non-ethanol gas. Rely less on biased information in forums.
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PaylessKY
Champion Author Kentucky

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Message Posted: Sep 25, 2013 9:00:01 AM

Check your owners manual. Most vehicles use regular (87).
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Hollierae
Rookie Author Wisconsin

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Message Posted: Sep 25, 2013 8:46:06 AM

No, As long as you are filling your tank with ethanol-mixed gas, it doesn't matter at all if it's regular or premium. It is the same as if you drink a low quality beer that someone p'd in or a higher quality beer that someone p'd in.
However, If you really want to improve your gas mileage and give it better fuel so your motor lasts longer, try to find (non-ethanol) premium.
Many Shell stations carry it and it will say 91 on the pump, not 93. 93 octane is premium 91 mixed with ethanol to boost the octane to 93. Don't let the 50 cents more per gallon scare you. You will more than make up the difference in improved gas mileage and less fuel consumption in your other products. Also, you will have less visits to your repairman which will save you even more money. It's kind of like if you pay more to eat healthier foods over paying less for the cheaper fast-foods. Are you really saving money when you have to see the doctor for a heart operation when healthier (more costly) foods could have prevented it? To each his/her own.
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TriniB
Champion Author Montreal

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Message Posted: Sep 25, 2013 12:08:53 AM

Regular
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hoosh13
Champion Author Vancouver

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Message Posted: Sep 24, 2013 5:28:45 PM

I use regular only
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jjb67
Veteran Author Orlando

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Message Posted: Sep 24, 2013 11:47:55 AM

Always regular...least expensive and it is what my car requires...nothing more, nothing less.
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MertieMan
Champion Author Lexington

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Message Posted: Sep 24, 2013 5:25:02 AM

You should always burn in the vehicle what the manufacturer recommends, and most of them specify 87 octane only. Nothing is gained by using a higher octane.
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krazkar
Champion Author Calgary

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Message Posted: Sep 23, 2013 10:44:17 PM

Just regular
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DHIGAJ
All-Star Author Toronto

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Message Posted: Sep 23, 2013 9:14:40 PM

regular
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forresj
Champion Author Wilmington

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Message Posted: Sep 23, 2013 7:59:21 PM

http://www.exxon.com/usa-english/gfm/fuels_quality_gas_faq.aspx

----------------------------------------

Why should I use your premium gasoline (91-93 octane) instead of regular (87) or midgrade (89)?
To find out what octane your engine needs, first check your owner's manual. The recommended level is often 87 octane. Some models have high compression engines which are designed to utilize the octane levels of 89, 91 or higher.

Ordinarily, your vehicle will not benefit from using a higher octane than is recommended in the owner's manual. But if your engine knocks or pings at the recommended octane level, you may need a higher octane gasoline to prevent the knock. Knocking may occur under certain conditions. A small percentage of vehicles may knock because of variations in engines of the same model due to manufacturing tolerances, or because of an unusual build-up of engine deposits. Other factors such as extremely hot weather, changes in altitude or hard driving conditions (like towing a heavy load) may also cause knocking. Many modern vehicles are equipped with an electronic device that detects and eliminates light knocking before you hear it.



[Edited by: forresj at 9/23/2013 8:02:08 PM EST]
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forresj
Champion Author Wilmington

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Message Posted: Sep 23, 2013 7:49:54 PM

..." If you use 91 octane gas in a vehicle designed for 87 octane gas you can eventually make your vehicle dependent on the higher octane & there's no reason to spend the extra 20 cents/gallon (or whatever the difference is at the time)..."


----------------------------

Dependent on higher octane? That's just silly. Where did you get this information?



[Edited by: forresj at 9/23/2013 7:50:38 PM EST]
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xbAG
Champion Author California

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Message Posted: Sep 22, 2013 10:00:24 PM

Regular
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delgadobb
Rookie Author Nevada

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Message Posted: Sep 19, 2013 8:27:15 PM

Octane has nothing to do with the quality of the gas - it has to do with how easily it burns. Lower octane = burns more easily. Higher compression & performance engines don't want the gas to burn prematurely so they require higher octane gas to delay the explosion created by high compression. Ever notice a lot of 85 octane gas when you're driving through high elevation areas? (i.e. Denver) There's less oxygen in the air so the gas needs to be a lower octane in order to be able to fire effectively. If the octane's too high when you're driving in the mountains, your car will really struggle to run.
Focus on finding the highest quality gas with the best detergents at the octane that's appropriate for your car. THAT'S more important. If you use 91 octane gas in a vehicle designed for 87 octane gas you can eventually make your vehicle dependent on the higher octane & there's no reason to spend the extra 20 cents/gallon (or whatever the difference is at the time).
Hope this helps.
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GAJDHI
Champion Author Montreal

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Message Posted: Sep 19, 2013 7:18:02 PM

regular gas
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Stumpy044
Rookie Author Hamilton

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Message Posted: Jun 28, 2013 2:00:32 PM

Premium as per owner's manual.
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Dako
Sophomore Author Stockton

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Message Posted: Jun 17, 2013 9:34:00 AM

Regular
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contiki
Champion Author Ontario

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Message Posted: Jun 17, 2013 8:01:04 AM

Always use regular gasoline........
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Skyjunky
All-Star Author Portland

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Message Posted: Jun 15, 2013 9:05:40 AM

I run 92 % Oct no lead, no ethanol a lot better gas MPG !!!!!!!!
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dvc2
Champion Author Oakland

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Message Posted: Jun 15, 2013 2:56:07 AM

reg
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carinthuist
Champion Author San Francisco

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Message Posted: Jun 15, 2013 1:45:42 AM

regular
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contiki
Champion Author Ontario

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Message Posted: Jun 14, 2013 10:20:50 AM

Regular always......
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contiki
Champion Author Ontario

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Message Posted: Jun 13, 2013 10:39:00 AM

Regular..........
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the1roadhog
Champion Author Atlanta

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Message Posted: Jun 13, 2013 9:02:54 AM

I go with what the Manny recommends.
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smugutu1234
Champion Author Tallahassee

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Message Posted: Jun 13, 2013 7:49:20 AM

Regular - and some vehicles it does matter.
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mia3bxs
All-Star Author Miami

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Message Posted: Jun 13, 2013 12:11:34 AM

I use Regular because to me an additional $0.35/gal is not worth it.
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REKEY
Champion Author South Carolina

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Message Posted: Jun 12, 2013 11:37:06 PM

I saw no difference using the Citco challenge!
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carefrey
Champion Author Orlando

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Message Posted: Jun 12, 2013 11:12:19 PM

I think regular does just fine!
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blckwolf
All-Star Author North Carolina

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Message Posted: Jun 12, 2013 10:18:35 PM

If the car manufacturer states that the engine requires premium, then you need to use premium. Engines designed for premium (usually in luxury and high performance cars and motorcycles) run better on premium. I did a test with my motorcycle, which requires premium. I consistently get about 4-6 MPG better mileage on premium, than on mid-grade because my engine is designed to run on premium. You need to do some testing. If you take say, a 100 mile trip, divide it by the MPG you get for that grade, and then multiply it by the cost of a gal. of that grade, you'll quickly figure out if it's worth using a higher grade or not (Trip miles/MPG*Cost/Gal).
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renegaudet
Veteran Author Houston

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Message Posted: Jun 12, 2013 9:44:48 PM

No if you want to pay for it go ahead.
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priver
All-Star Author Alberta

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Message Posted: Jun 12, 2013 8:54:42 PM

yup. about $1 more a gal..
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MTK143
Veteran Author Pittsburgh

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Message Posted: Jun 12, 2013 9:35:26 AM

reg
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forresj
Champion Author Wilmington

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Message Posted: Jun 12, 2013 9:22:16 AM

Use what's recommended on your owner's manual. Only use higher octane gas if you have problems with engine knock. Otherwise, it just a waste of money. But hey, if you want to give your money away to rich "fat cats" and terrorists, that's your decision. I hope you can live with yourself.
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