Recent Topics
help me choose...
by chaindrive
06/21/18 04:07 PM
France F1 Grand Prix
by DeepFriar
06/21/18 03:16 PM
Valvoline High Mileage with maxlife tech semi-syn
by bradtech
06/21/18 03:16 PM
Best additive in oil to clean sludge?
by ffgb
06/21/18 02:19 PM
Who is a Dirt Track regular?
by thooks
06/21/18 01:39 PM
eco plug oil plug video is restricted
by edwardh1
06/21/18 01:27 PM
Political comments
by ridgerunner
06/21/18 01:23 PM
My Ford orange turned pink
by BeerCan
06/21/18 12:45 PM
Any plants/garden experts?
by maverickfhs
06/21/18 12:43 PM
Internet Sales Tax O.K.ed by Supreme Court
by doitmyself
06/21/18 12:23 PM
Brake fluid for a '03 Volvo S60
by earthworm
06/21/18 11:22 AM
Oil Weight Change - Mid Production Cycle
by PolarisX
06/21/18 11:20 AM
Kia ATF - OEM, Eneos, Maxlife - TDS - DIFFERENT!
by Spddm0n
06/21/18 11:19 AM
Dillon Precision Is Simply The Best!
by 2015_PSD
06/21/18 11:17 AM
First OCI - 156k miles Prius
by Greg L
06/21/18 11:11 AM
Brake Squeal on Rear Discs
by BlitzPuppet
06/21/18 11:10 AM
Coolant leak.
by LeakySeals
06/21/18 11:05 AM
Looking for a Home Depot coupon 10% off?
by GravelRoad
06/21/18 10:59 AM
Which is more important for low wear HTHS or ZDDP?
by Building3
06/21/18 10:40 AM
Valvoline DuraBlend 80W-90
by dogememe
06/21/18 10:34 AM
Newest Members
wil892, Spddm0n, ronw1309, Suth31, yamahaboy125
65286 Registered Users
Who's Online
108 registered (28oz, bdcardinal, aquariuscsm, 77GrandPrix, azjake, 2015_PSD, 8 invisible), 1662 Guests and 42 Spiders online.
Key: Admin, Global Mod, Mod
Forum Stats
65286 Members
67 Forums
285719 Topics
4768463 Posts

Max Online: 3590 @ 01/24/17 08:07 PM
Donate to BITOG
Page 1 of 2 1 2 >
Topic Options
#4441499 - 06/25/17 09:12 PM Is there any benefit to using premium fuel?
Greatwhite7 Offline


Registered: 06/18/16
Posts: 30
Loc: Australia

Is there any benefit in your opinion to using 98/95 RON fuel over 91, or even any science to prove that premium fuel is "better"?

I have a Ford BA XR6 turbo sedan and once had to put 91 in it and noticed ZERO change.

Currently listening to a news piece on CBS and they are saying that there is no difference.

In Oz premium fuel can cost up to 20c more per litre (80c/gal).

Top
#4441505 - 06/25/17 09:16 PM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
eljefino Offline


Registered: 06/15/03
Posts: 32635
Loc: ME
Yes, but apparently not for you. Knock sensors are a real part of virtually all engine management systems now, and part of a feedback loop vs just retarding timing in an emergency.

Top
#4441509 - 06/25/17 09:18 PM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
Johnny2Bad Offline


Registered: 05/20/13
Posts: 1810
Loc: Saskatchewan, Canada
Yep, if the engine calls for Premium. Otherwise, no.

Most modern cars that require Premium have a computer mode that adjusts the timing via a knock sensor that will detect 87/89 and will put the engine down on power, but most users don't actually use the maximum power anyway and would not notice.
_________________________
'57 FL Straight 50 wt
'90 Miata 1.8L w/Rotrex Supercharger [Mobil1 0W-40]
'96 Ram 1500 [3.7L Mobil1 0W-20 / 1L 15W-50]
'01 PT Cruiser [Mobil1 0W-40]

Top
#4441510 - 06/25/17 09:18 PM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
demarpaint Offline


Registered: 07/03/05
Posts: 29771
Loc: NY
Only if the engine calls for it.
_________________________
God Bless Our Troops


Top
#4441517 - 06/25/17 09:25 PM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
Wolf359 Online   content


Registered: 04/27/12
Posts: 4751
Loc: MA
In the US, they typically have 93 on the east coast and 91 on the west coast. Not exactly sure why now, might just be the way it is, I think there was more demand for super on the west coast at one point. Anyway, the car I drive just calls for 91 as a minimum so I occasionally mix 1/3 regular with 2/3 super to end up a 91 mix instead of using straight 93. Don't notice any difference regardless of whether I use the mix or not. Gas mileage is about the same.

Top
#4441518 - 06/25/17 09:27 PM Re: Is there any benefit to using premium fuel? [Re: Johnny2Bad]
Greatwhite7 Offline


Registered: 06/18/16
Posts: 30
Loc: Australia
Originally Posted By: Johnny2Bad
Yep, if the engine calls for Premium. Otherwise, no.

Most modern cars that require Premium have a computer mode that adjusts the timing via a knock sensor that will detect 87/89 and will put the engine down on power, but most users don't actually use the maximum power anyway and would not notice.


Mine recommends 95 min.
Perhaps that is what happened to mine when I used 91, as there was no knocking or any power loss, but I was only doing 100km/h, maybe 110.

Top
#4441520 - 06/25/17 09:28 PM Re: Is there any benefit to using premium fuel? [Re: Wolf359]
Greatwhite7 Offline


Registered: 06/18/16
Posts: 30
Loc: Australia
Originally Posted By: Wolf359
In the US, they typically have 93 on the east coast and 91 on the west coast. Not exactly sure why now, might just be the way it is, I think there was more demand for super on the west coast at one point. Anyway, the car I drive just calls for 91 as a minimum so I occasionally mix 1/3 regular with 2/3 super to end up a 91 mix instead of using straight 93. Don't notice any difference regardless of whether I use the mix or not. Gas mileage is about the same.


Spent 2 weeks recently driving around in a 3.8l Mustang and used all diff kinds and noticed no change.
Power seemed about the same too.
Not sure if that car requires premium tho.

Top
#4441530 - 06/25/17 09:45 PM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
TexasVaquero Offline


Registered: 05/31/17
Posts: 127
Loc: South Texas Rancho
My car recommends 91 octane--- I have a VERSA. Who would have thought? I still use 87 octane because it can handle it and it is cheaper.
_________________________
2014 NISSAN VERSA 5spd M/T- M1 EP 5w30 and M1 EP Filter. 5k OCI.
2011 CHEVY IMPALA 3.5ltrs - M1 HM 5w30 and M1 EP Filter. 3k OCI.

Top
#4441531 - 06/25/17 09:45 PM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
Wolf359 Online   content


Registered: 04/27/12
Posts: 4751
Loc: MA
Originally Posted By: Greatwhite7
Originally Posted By: Wolf359
In the US, they typically have 93 on the east coast and 91 on the west coast. Not exactly sure why now, might just be the way it is, I think there was more demand for super on the west coast at one point. Anyway, the car I drive just calls for 91 as a minimum so I occasionally mix 1/3 regular with 2/3 super to end up a 91 mix instead of using straight 93. Don't notice any difference regardless of whether I use the mix or not. Gas mileage is about the same.


Spent 2 weeks recently driving around in a 3.8l Mustang and used all diff kinds and noticed no change.
Power seemed about the same too.
Not sure if that car requires premium tho.


Not sure about Mustang but my Mercedes does say so on the gas filler door that the minimum octane rating is 91. If the Mustang just requires regular, I wouldn't expect you to notice any difference.

Top
#4441589 - 06/26/17 12:37 AM Re: Is there any benefit to using premium fuel? [Re: Wolf359]
umungus1122 Offline


Registered: 02/12/08
Posts: 1061
Loc: PA
The 3.8 in the stang does NOT require premium. Won't benefit you at all.
_________________________
'95 Chevy 1/2t 305 205k -DuraBlend 5w-20, Puro Gold filter
'89 Jeep Comanche 4.0 278k - GC 0w-30, Bosch LongLife filter

Top
#4441592 - 06/26/17 12:52 AM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
nyumski Offline


Registered: 05/14/15
Posts: 227
Loc: Indonesia
lol since ur case is same with me in Indonesia.

need or not,it depends on ur car. since u use RON same like me here.

for example if ur manual book says at least RON 91 and it better use 1-2 level from standard like 92 or 93.

use 98 so much waste u can count in every dollar spent..

and u just mess up with the injection timing. RON 98 is used with super high compression or high turbo boost.
_________________________
14 Toyota 2.5 D4D - AISIN CL4/SL 10w40

Top
#4441632 - 06/26/17 03:43 AM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
hpb Offline


Registered: 08/28/14
Posts: 1209
Loc: Tasmania, Australia
From the owners manual in my BF Falcon (note, BA may be different).

"All petrol vehicles can use unleaded petrol with a minimum octane rating of 91 (RON). Higher octane unleaded petrol may be used without detriment. Premium unleaded petrol with a minimum octane rating of 95 (RON) is recommended for use in XR6 Turbo and XR8 vehicles for maximum performance. These vehicles are also calibrated to run on unleaded petrol."

I take that to mean it'll run just fine on 91, especially if you're just loafing along the highway at 2,000rpm most of the time.

If it were me, I'd do 5 tanks on 91 and accurately measure the fuel consumption. Then I'd do 5 tanks on 95 and check the economy. In theory, the 95 "should" deliver better fuel economy, but if the better economy doesn't cancel out the extra cost, I'd stick with the 91. This is, of course, assuming the engine runs OK on 91, with no pinging, loss of power, poor idle, etc. Hopefully that makes sense...


Edited by hpb (06/26/17 03:44 AM)
_________________________
MY16 Mitsubishi Outlander 2.2 diesel, 45,000km - Castrol 5w30
2006 Ford Falcon 4.0, 132,000km - Penrite Vantage 15w40, Ryco filter

Top
#4441669 - 06/26/17 06:11 AM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
skyactiv Online   content


Registered: 03/02/13
Posts: 4396
Loc: The Midwest
More gas engines in vehicles in North America than not are designed to run on 87 octane.

Mazda has higher compression in the Skyactiv engine used in Europe than in North America.
Mazda supposedly told the auto press they use lower compression here due to us being addicted to 87 octane.

Europe's low octane is most places is equivalent to our 91 octane fuel. There highest octane at the pump is equivalent to what would be 96 octane here.

If 87 octane was replaced with 91 octane as the lowest octane gas at the pump here in the U.S., the auto makers would have higher compression
engines with a tad more power and fuel economy.

GM isn't gonna make a Chevy Cruze tuned for 91 octane that would otherwise break ring lands on 87 octane.
We are having a chicken or the egg thing with our junk gas.
_________________________
Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual

Top
#4441685 - 06/26/17 06:54 AM Re: Is there any benefit to using premium fuel? [Re: skyactiv]
Kira Offline


Registered: 08/19/10
Posts: 5240
Loc: Champlain/Hudson Valley
When I'm pooping around town I use regular gas and rely on the knock sensors to keep things quiet. Plus I drive quite conservatively.

When I go out of town I'm in hilly, if not mountainous, regions so I throw some premium in so the engine can do any 'performing' it can with its spark advance.

I think my 2007 5 cylinder Volvo (2.435cc-20 valve-168hp) takes mid grade.

Also, there in no difference in heat content among grades of gas. Running premium in your 230 Chevy six or Chrysler Slant six gets you nothing.

Top
#4441736 - 06/26/17 07:55 AM Re: Is there any benefit to using premium fuel? [Re: Greatwhite7]
IndyFan Offline


Registered: 06/16/05
Posts: 560
Loc: Danville, Indiana
My Jeep will occasionally develop some knock. I used to run a couple bottles of fuel system cleaner through it and do an Italian tune-up, and that would make it subside for awhile. I then decided it was no more expensive to run a tank or two of V-Power (93 octane) through it. Two tanks of V-Power work much better. The knock disappears for about 6 or 8k miles, maybe more. I seem to notice the knock more when going from winter to summer formulated gas, too. The old 3.8 feels very noticibly better when running 93, and even when running 89.

It also runs much better on 87 octane gas that has no ethanol. Wish I had that close to home. It noticeably increases mileage and power, too. Not sure how it effects knock, since I don't run it often enough.

I used to have an 06 Solstice with a 2.4 Ecotec engine. It allowed for 87 gas but the owners manual specifically stated it would produce slighy more horsepower with 91 Octane. I could tell a small difference, and it got slightly (very slightly) better mileage with premium.

My 99 E430 says "Premium Fuel Only", meaning at least 91 octane. I run 87 in it much of the time, and feel no difference at all, with no difference in mileage. I don't worry about it, because guys on a Mercedes forum have run the 4.3 engine on nothing but 87 for hundreds of thousands of miles with no issue. Also, I've seen E class cars in parts of the world where the fuel quality would be suspect, so I doubt MB made this engine highly sensitive to fuel. Someone feel free to correct me if I'm wrong on my assumptions, but the car runs like new.

All of my other engines see no difference in performance, mileage, sound, or feel, between 87 or 93 octane.

Interestingly, I had a 93 Johnson 60hp outboard that went into limp home mode when run for awhile on 93 octane. It indicated an overheating condition, so ever since, I've steered clear of anything other than 87 in my outboards.


Edited by IndyFan (06/26/17 08:01 AM)
_________________________
18 Jeep JLUR Wrangler 3.6 5k
15 Ford Transit 93k, Reman 3.5 @85k
08 Jeep Wrangler 3.8 123k
01 Ford F150 Crew 5.4 79k
99 Mercedes E430 Sport 89k

Top
Page 1 of 2 1 2 >