Mustang Owners Club Australia Forum

Generation 6 - S550 Discussion Area => Tech Torque Post 2015 => Topic started by: boss69hogg on October 13, 2016, 06:56:06 pm

Title: Which fuel to use?
Post by: boss69hogg on October 13, 2016, 06:56:06 pm
Ok, so according to my research the ecoboost can use e10 fuel, whilst the GT has to have the 98 RON.

Just going through the owners manual for mine (GT) and it states (pge 98):

"We recommend that you only use high quality fuel the car."

"The engine in your vehicle has been optimised for operation using 95 octane unleaded gasoline

"The engine in your vehicle can also operate using 91 octane unleaded gasoline. However, if you choose to do so, you may notice some minor loss of performance, economy and increase engine noise.

Your vehicle is suitable for use with ethanol blends up to 10% (E5 or E10).....the use of gasoline containing ethanol may increase the fuel consumption of your vehicle."

So, it would seem that it can run on any of the 4 petrols on offer - with noted loss of power, performance and increased engine noise for the 91 and E10.

Whilst I wouldn't love to use nothing but 98, I have to be practical in the knowledge I'll do 40,000ks a year in mine as she is my daily drive. So thinking of going with the 95.

Thoughts?
Title: Re: Which fuel to use?
Post by: mwizz on October 13, 2016, 08:46:29 pm
I've been using 98 in mine but have not driven it that much
Title: Re: Which fuel to use?
Post by: GLENN 70 on October 13, 2016, 10:22:04 pm
If they say it can run on 95 so be it but don't use 95 E10 ,it still causes problems .  98 when the price is down and 95 when the price up . I prefer BP then Caltex for fuel .
Title: Re: Which fuel to use?
Post by: birdman on October 13, 2016, 11:10:10 pm
If they say it can run on 95 so be it but don't use 95 E10 ,it still causes problems .  98 when the price is down and 95 when the price up . I prefer BP then Caltex for fuel .

Exactly Glenn. I'm with you.
Title: Re: Which fuel to use?
Post by: russ68 on October 14, 2016, 06:39:02 am
I think you'll find the U.S. has a different octane measuring system. I stick with 98 from BP for the new mustang and Caltex 95 for the 65 stang.
Title: Re: Which fuel to use?
Post by: GLENN 70 on October 14, 2016, 10:05:56 am
The only problem is as far as I am aware the GT v8 should be running on 98 but the E boost can run on 95 . 
Title: Re: Which fuel to use?
Post by: JasonK on October 14, 2016, 10:59:35 am
I have the 5.0, and it has done just on 10,000 k's so far. It gets non-E10 95, 98 and standard only when the other two aren't readily available and it desperately needs a drink.
Can't say I have noticed any issues with any of the fuel, power or consumption - but the way I drive it drinks like a drunken sailor anyway, so a little less fuel economy would not be something I notice.
Title: Re: Which fuel to use?
Post by: 66 Stang on October 14, 2016, 01:49:39 pm
Our GT clearly states inside the fuel cap in can run on E10, I have put a tank of E10 through it, and it hasn't made any difference on power output that I could tell, most times its run on 95.
Title: Re: Which fuel to use?
Post by: GLENN 70 on October 14, 2016, 03:13:20 pm
Sure you can run E10 but it's not nice fuel ,try not too .
Title: Re: Which fuel to use?
Post by: boss69hogg on October 14, 2016, 04:15:01 pm
Our GT clearly states inside the fuel cap in can run on E10, I have put a tank of E10 through it, and it hasn't made any difference on power output that I could tell, most times its run on 95.

Interesting that mine doesn't (Jan 16 build)
Title: Re: Which fuel to use?
Post by: Jors on January 03, 2017, 04:36:18 pm
So let me get this straight. You have purchased a new $60k plus GT with a performance engine in it and you are trying to save money on fuel. If that were the case why didn't you just get the eco boost?
Some quick math to change your mind on the 98 to 95 fuel. The average difference in price between these is 5c. You say you are going to do 40,000 a year. So if you average 10L per 100km, it will probably be higher doing those huge kms you are doing, you need 4000L of fuel.
That works out to a difference of $200 a year for 95oct and 98.
I don't know about you but after I just purchased my $60k GT, I'm not going to risk my engine for $0.05 a litre......
Just saying.
Title: Re: Which fuel to use?
Post by: scollist on January 03, 2017, 05:09:39 pm
So let me get this straight. You have purchased a new $60k plus GT with a performance engine in it and you are trying to save money on fuel. If that were the case why didn't you just get the eco boost?
Some quick math to change your mind on the 98 to 95 fuel. The average difference in price between these is 5c. You say you are going to do 40,000 a year. So if you average 10L per 100km, it will probably be higher doing those huge kms you are doing, you need 4000L of fuel.
That works out to a difference of $200 a year for 95oct and 98.
I don't know about you but after I just purchased my $60k GT, I'm not going to risk my engine for $0.05 a litre......
Just saying.

And the worst thing is that E10 actually has about 6% less fuel economy (news article about 3 years ago) - so the 5 cents per litre saving is actually not a saving at all.  3.8% cost saving at $1.30 p/l for 6% loss of economy doesn't make sense.
Title: Re: Which fuel to use?
Post by: scollist on January 03, 2017, 05:12:26 pm
And the worst thing is that E10 actually has about 6% less fuel economy (news article about 3 years ago) - so the 5 cents per litre saving is actually not a saving at all.  3.8% cost saving at $1.30 p/l for 6% loss of economy doesn't make sense.

And here is the article - http://www.carsguide.com.au/car-reviews/unleaded-vs-e10-the-comparison-test-29451 (http://www.carsguide.com.au/car-reviews/unleaded-vs-e10-the-comparison-test-29451)
Title: Re: Which fuel to use?
Post by: gazzab055 on January 03, 2017, 07:57:44 pm
E10 is a con on the Australian motorist, there is no advantage using E10, it is not environmentally friendly nor economical, just a ploy from the ethanol producers to make money. Ethanol, like methanol, only has half the energy per volume than petrol, usually measured in BTUs (british thermal units).

The ethanol lobby in the USA (corn producing Lobby)has been running this con for decades. On a trip to the US in 2004 I used their low octane fuel whenever I could and calculated my fuel consumption over the 20,000 miles I covered. In South Dakota I had no choice and had to use E10. I drove diagonally across the state, which is pretty flat and my fuel use rose 10% not the 5% I was expecting. I will never use or recommend E10 again.

As the Mustang 5.0 litre is a higher compression engine it needs higher octane fuel to perform well, so take Glenn's advice and use either 95 or 98 non ethanol fuel.
Title: Re: Which fuel to use?
Post by: austang on January 03, 2017, 08:21:41 pm
.. I stick with 98 from BP for the new mustang and Caltex 95 for the 65 stang.
Russ, can I ask why you prefer BP and Caltex for the different RON grades?
Title: Re: Which fuel to use?
Post by: GLENN 70 on January 03, 2017, 08:54:19 pm
Only 5 cents between unleaded 95 and unleaded 98 well not here ,try 10 cents per litre . At present at some servo s  E10 is $1.18 ,91 unleaded $1.20 , unleaded 95 is $1.28 and unleaded 98 is $1.38 cents per litre . My RAV 4 I run 91 unleaded ,my 66 mustang 98 unleaded and my 70 I run what ever but not E10 . The only thing I use E10 for is killing weeds  :grin:  just don't use E10 and don't let them get rid of 91 unleaded ,which they are pushing for .
Title: Re: Which fuel to use?
Post by: gazzab055 on January 03, 2017, 09:24:58 pm
I remember about ten years ago the state government tried to get rid of unleaded to pacify the ill informed greens and environmentalists. Some service stations stopped selling it , but when their customers left them they soon returned to selling unleaded. The state government, made up of too many lawyers, is now trying to slowly legislate it out.
Title: Re: Which fuel to use?
Post by: lukep6470 on January 04, 2017, 11:27:19 am
Sugar and corn syrup consumption is collapsing so they are pushing other markets for it.
Title: Re: Which fuel to use?
Post by: GT Sally on January 04, 2017, 09:24:21 pm
I only use BP 98, in my S550, my 1966 289 & my 1980 Chrysler Lancer with valve additive.....BP 95 in my 1985 Honda NH80 Lead motor scooter....NEVER E10 IN ANY !!!!!
Title: Re: Which fuel to use?
Post by: boss69hogg on September 12, 2017, 08:11:39 pm
So let me get this straight. You have purchased a new $60k plus GT with a performance engine in it and you are trying to save money on fuel. If that were the case why didn't you just get the eco boost?
Some quick math to change your mind on the 98 to 95 fuel. The average difference in price between these is 5c. You say you are going to do 40,000 a year. So if you average 10L per 100km, it will probably be higher doing those huge kms you are doing, you need 4000L of fuel.
That works out to a difference of $200 a year for 95oct and 98.
I don't know about you but after I just purchased my $60k GT, I'm not going to risk my engine for $0.05 a litre......
Just saying.

So you're saying using 95 is a risk to the engine. What is the basis for this position? Do you base this on some scientific research or personal opinion. I note your position goes against what Ford say. In fact, both Ford and the federal government fuelforthiught.com.au site stipulate that the 2016 GT Mustang is suitable to use e10 on a daily basis. So if both the federal government and the manufacturer say it's ok to use, who do I sue first when it destroys my motor as so many experts on this site seem to suggest?

Yes, I'm trying to save a few dollars on fuel, anyone who doesn't try to save a few dollars where they can either have too much money or are too stupid.

Am about to clock up 40,000ks in just under a year. 95 is about 8-10 cpl cheaper than 98 where I live, so that's a savings of $320-$400 so far - for doing nothing more than picking up a different coloured fuel pump. Pays for my greenslip. If that makes me a tightass or stupid, I'm good with that.

Thanks for your insightful words of wisdom
Title: Re: Which fuel to use?
Post by: GLENN 70 on September 12, 2017, 09:29:14 pm
I am being a smart A here but the only time I use e10 is to kill the weeds around my home .  I won't put e10 in my mustang nope no way .  The only problem really that I can see it will block up the cats ,well that's what I think anyway . Late model engines are made to run on that stuff and that stuff is getting better than when it 1st came out .
Title: Re: Which fuel to use?
Post by: FraG on September 17, 2017, 12:22:03 am
Use BP U98 nothing else.  The Octane Adjust Ratio is derived off the fuel, lower quality fuels retard timing and can cause other issues like LSPI which is bad for these engines.  I would suggest sucking it up and buying the BP U98, mine has run nothing else since new and will stick to it.  While it can run on worse fuels, its not recommended.

LSPI, increased chance of knock and lower performance, direct injection plays nice with better fuels, I dont know what else to add to the list??!!  But hey you do what you like, not sure how long you intend to keep the car but if you have already done 40k kms I would say your warranty will be up before 3 years so if you want to keep her in good shape when it runs out, think of it as an insurance policy.
Title: Re: Which fuel to use?
Post by: GLENN 70 on September 17, 2017, 09:10:12 am
The only problem with BP is they stick to you with the price .  If they dropped the price  the other fuel companies would drop there prices .
Title: Re: Which fuel to use?
Post by: 66 Stang on September 18, 2017, 11:10:03 am
off topic I know, BUT...

My 4 year old holley on my falcon started pissing fuel out the top of the carb, cleaned carby etc and still did it, pulled the float adjustment screws, and rubber o rings perished, I was told by the 95 fuel, quite bizarre.
Title: Re: Which fuel to use?
Post by: scollist on September 18, 2017, 11:34:42 am
Edit:  the below comment is incorrect. See later posts on this thread.

@@@@@@@@@@@@

I'm pretty sure all 95 is Ethanol E10.  It will eat rubber.

Avoid Ethanol and stick with 98 (or 91 if your engine is built for it).
Title: Re: Which fuel to use?
Post by: scedd1 on September 18, 2017, 04:25:15 pm
Frankenstang only has 98 in it, but then i thrash it something shoccking.
The Princess's MY12 SS Bogandore has always had E10 in it and it runs fine.
It's a 5 1/2 year old LS2 and when we bought it GMH had it stickered to run E85.
When she trades it on a new Mustang GT next year, i dont see why that wont be using E10 either.
These world engines from Ford & GM are made for it.
Title: Re: Which fuel to use?
Post by: GEOFF289 on September 18, 2017, 05:12:03 pm
I'm pretty sure all 95 is Ethanol E10.  It will eat rubber.

Avoid Ethanol and stick with 98 (or 91 if your engine is built for it).

Don't think so Shane. 95 is just petrol. E10 actually has a RON octane of 94.

Servos are required by law to display the ethanol content of any fuel they sell at the pump.

https://www.canstarblue.com.au/vehicles/which-petrol-should-you-use/

http://www.environment.gov.au/topics/environment-protection/fuel-quality/standards/ethanol-e10
Title: Re: Which fuel to use?
Post by: scollist on September 18, 2017, 09:47:35 pm
Don't think so Shane. 95 is just petrol. E10 actually has a RON octane of 94.

Servos are required by law to display the ethanol content of any fuel they sell at the pump.

https://www.canstarblue.com.au/vehicles/which-petrol-should-you-use/

http://www.environment.gov.au/topics/environment-protection/fuel-quality/standards/ethanol-e10

Thanks Geoff. I stand corrected. I'll edit my earlier post.
Title: Re: Which fuel to use?
Post by: GLENN 70 on September 18, 2017, 09:59:48 pm
I thought most E 10 fuels were 95 .  You can buy premium 95 at some service stations but not all ,most only sell 98 as there premium fuel .
Title: Re: Which fuel to use?
Post by: Cadd on September 18, 2017, 10:09:16 pm
Hey just my opinion but I know all Caltex /Woolworths stations still at this time sell 95 as a premium unleaded NO ETHANOL which is all I have used in any car I have owned or the last 10 years(3 mustangs 2 falcons inc a turbo &GT and a focus sports) and I have never had any issues ..is only fuel I will and have used.
Title: Re: Which fuel to use?
Post by: stormin on September 19, 2017, 08:26:09 pm
There is no way I will ever use E10 again. I tried it in my 65 F/B for a while until it appears some of the rubber in or around the carby had dissolved resulting in an engine bay fire.  Thank heavens for a good fire extinguisher. I was with an elderly relative today who was taking delivery of a new car. I asked what fuel she should use and was told 95/98 was preferred but never E10 as it will melt any rubber it comes in contact with.
Stormin
Title: Re: Which fuel to use?
Post by: GLENN 70 on September 19, 2017, 08:46:37 pm
Late model cars are ok with E10 ,they are built for it ,but I still don't use it  :grin:  . You think E10 is bad how about E85  :thud:  . 
Title: Re: Which fuel to use?
Post by: gazzab055 on September 20, 2017, 04:21:21 pm
E10 and E85 is another government con, it is NOT environmentally friendly, nor is it really cheaper.
Title: Re: Which fuel to use?
Post by: StephenSLR on September 26, 2017, 10:18:19 am
The Octane Adjust Ratio is derived off the fuel, lower quality fuels retard timing and can cause other issues like LSPI which is bad for these engines.

A friend did a mileage check and he claims he gets more mileage per dollar out of 98 so the extra he pays is worth it. Of course it was a recent model Mustang with sensor that adjusts timing to the octane.

s
Title: Re: Which fuel to use?
Post by: Giffo on September 26, 2017, 06:44:58 pm
If they say it can run on 95 so be it but don't use 95 E10 ,it still causes problems .  98 when the price is down and 95 when the price up . I prefer BP then Caltex for fuel .

I agree. I use 98 when price low and 95 other times. No 91unleaded for my Mustang Cobra.....

 :event:
Title: Re: Which fuel to use?
Post by: BRUMBE on October 01, 2017, 06:59:31 am
I use 98 (Caltex of Shell) in my new GT convertible.  It's a no brainer for me - the engine warrants the premium fuel and I do about 35,000 km per year.

Further, as I lease I get wholesale post pump prices anyway through fuel card. I usually use a Caltex (on Mustang Avenue, believe it or not) near Canberra airport which pretty much price matches the neighbouring Costco fuel prices so really well priced.
Title: Re: Which fuel to use?
Post by: birdman on October 01, 2017, 04:06:26 pm
I use 98 (Caltex of Shell) in my new GT convertible. 

You mention Shell...  :sick: If you appreciate your car stick with BP or Caltex run away from Shell
Title: Re: Which fuel to use?
Post by: GLENN 70 on October 01, 2017, 04:12:52 pm
Nothing wrong with shell  fuels as long as you hate your car .  Try and use shell fuel when you use a nitros kit ,ping ping ping ,rattle rattle rattle .
Title: Re: Which fuel to use?
Post by: birdman on October 01, 2017, 04:39:47 pm
Nothing wrong with shell  fuels as long as you hate your car .  Try and use shell fuel when you use a nitros kit ,ping ping ping ,rattle rattle rattle .

 :grin: :evilone: cheeky bugger...
Title: Re: Which fuel to use?
Post by: GLENN 70 on October 01, 2017, 07:49:58 pm
Birdman , I never touch the stuff  :thud:     :grin:
Title: Re: Which fuel to use?
Post by: birdman on October 01, 2017, 08:53:42 pm
Birdman , I never touch the stuff  :thud:     :grin:

I know, neither do i!! This topic has been talked about numerous times...
Title: Re: Which fuel to use?
Post by: StephenSLR on December 13, 2017, 09:41:00 pm
https://www.youtube.com/watch?v=WYlk9C1o0nk

I usually don't pay much attention to this gronk but this time I think he's right on the money.

s
Title: Re: Which fuel to use?
Post by: BAC on December 13, 2017, 10:59:49 pm
 :agree:   People who put higher octane fuel in their car than what the manufacturer specifies in the belief they are doing a good thing are simply deluding themselves.  Claims of noticeable extra power and/or significantly better fuel economy are just fantasy...

E10 on the other hand is indeed the handiwork of Lucifer himself and should be avoided like the plague.
Title: Re: Which fuel to use?
Post by: GLENN 70 on December 14, 2017, 09:42:31 am
Talking about fuels  ,here is a strange one . A few people I know of , with hi performance cars/ engines and running Carbys ,have had fuel problems with the Carby flooding and fuel coming out the vent tubes . Been happening on the race tracks ,street and on dyno s . We have tried everything to stop this  happening and wondering why . Myself and a top dyno guy think as all the engines were running BP 98 it's the BP fuel additives causing the problem . The only way we think we have solved the problem is running return lines back the the tank even with mechanical fuel pumps .
Title: Re: Which fuel to use?
Post by: birdman on December 14, 2017, 09:00:01 pm
The only way we think we have solved the problem is running return lines back the the tank even with mechanical fuel pumps .

I've heard this recently mate...