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  #13  
Old 03-21-2013, 08:54 AM
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Re: Fuel Requirement GC 2014 V8 owners

maybe on your fusion it is not working, as it has a rubbish engine inside

but modern engines check automatically what kind of octane they get and know
how to handle.

and the v8 hemi is the same engine running in the usa and in europe.
here it is recommended to use them with 95 or 98 octane
and it will definetely need more gas when running with only 87 octane.

even nearly ALL high performance cars need to use 98 to 100 octance gas,
what do you think why ?!? ... as only with this gas the engines can get the
maximum power out of it.

and this is much better gas then to go with only 87.

it is like that. !!!
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Old 03-21-2013, 09:06 AM
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Quote:
Originally Posted by SunShine31x View Post
maybe on your fusion it is not working, as it has a rubbish engine inside

but modern engines check automatically what kind of octane they get and know
how to handle.

and the v8 hemi is the same engine running in the usa and in europe.
here it is recommended to use them with 95 or 98 octane
and it will definetely need more gas when running with only 87 octane.

even nearly ALL high performance cars need to use 98 to 100 octance gas,
what do you think why ?!? ... as only with this gas the engines can get the
maximum power out of it.

and this is much better gas then to go with only 87.

it is like that. !!!
I believe step one is the fact you are in Europe. If I remember right you guys measure octane different over there.

High performance cars do require higher octane gas because they are designed for it, not to insult anyone here but the 5.7 hemi is by no means a high performance engine. It will not take advantage of the higher octane. It doesn't sense what octane you have in the tank it will just run as much advance as is in the timing map until it detects detonation, then it will start pulling timing until it goes away, then start adding timing until detonation starts again and keeps going back and forth until it finds where the detonation is and runs the timing there. If you add some sort of programmer then sure if you have the 91 or 93 octane tune you should be running that, if not you are just throwing money away. For the record it wasn't just my fusion I have done this to, every vehicle I have owned I try it, same thing every time.
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Old 03-21-2013, 09:38 AM
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Re: Fuel Requirement GC 2014 V8 owners

maybe we do measure it different .... but that huge difference. ?!?
... but thanks for the information, good to know.

but quite poor for an engine built in 2013 ... not having these standard features on board.

would be more easy if there would be one world standard at all
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  #16  
Old 03-21-2013, 10:01 AM
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Re: Fuel Requirement GC 2014 V8 owners

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Originally Posted by SunShine31x View Post
maybe we do measure it different .... but that huge difference. ?!?
... but thanks for the information, good to know.

but quite poor for an engine built in 2013 ... not having these standard features on board.

would be more easy if there would be one world standard at all
You do, and it is quite different.

Running high test in a Hemi will do you no good, it's calibrated for 87/89. If you use 89 it ill run at normal timing and prove slightly more power. If you run 87 it will pull timing and slightly reduce power. If you run 91 you will only get the effect that the 89 had, and it may interfere with the MDS system (based on reports on the boars here, not sure how accurate that is so take it with a grain of salt).

We still have to get a lot of Europe to drive on the right side of the road before we even think about measuring octane the same way.
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Old 03-21-2013, 10:35 AM
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Re: Fuel Requirement GC 2014 V8 owners

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Originally Posted by SunShine31x View Post
Hi,

no, the more octane the better the engine will run and the less it will consume
as the fuel efficiency is getting better.

so, your engine will say, thank you.
here we only have 91 to 100 octane gas in europe.
Nope. Not at all. And it's a waste of money. Octane calculations are different here, too. We have typically 87, 89 and 91 derived by the specific formula used in North America.

Higher octane burns slower and is used in engines that require that the fuel not light off prematurely from things like higher compression. ("knocking") It provides zero benefit for engines that don't require it. The Hemi V8 in the GGC will run "best" with 89 octane (US calculation) but runs just great on 87. The manufacturer indicates that 87 is acceptable in the manual. The computer compensates for this automatically. To-date, I've only put 89 in one time and that was accidentally...really...I picked up the wrong nozzle and was filled before I noticed.
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  #18  
Old 03-21-2013, 11:03 AM
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Re: Fuel Requirement GC 2014 V8 owners

ok, i got it ... and many thanks for the lessons

... but interesting anyway.
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  #19  
Old 03-22-2013, 02:15 AM
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Re: Fuel Requirement GC 2014 V8 owners

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Originally Posted by FAUEE View Post
Slightly less hp are the implications. The vehicle is smart enough to sense that it has 87 in it, and will pulling timing back to compensate. This yields a slight (15ish?) loss in hp.

People will tell you that its better to use 89 long term for a variety of (mostly bogus) reasons. Keep in mind, the Hemi is also a work truck engine, and can run for hundreds of thousands of miles on 87.

Sometimes I feel like I get slightly better fuel economy using 89. It may be a psychological thing though.
I dont think it is psychological. Compression Ratio has a huge impact on the otto efficiency of an engine. The compression ration doesnt change, but the advance of the spark is effectively a dynamic change to compression ratio and hence increases efficiency... Efficiency is a double edged sword in that more power normally makes the right foot put more of a grin on your dial... but that efficiency (all things being equal) will also give better economy. The knock sensors will advance the ignition in a vehicle like this and you will see economy increases... We get 91 standard octane, 95 and 98 octane in Oz. You do measure Octane via RON, dont you in the US?
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Old 03-22-2013, 02:20 AM
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Re: Fuel Requirement GC 2014 V8 owners

Readin further on here... If the overseas versions do not advance to the point that they will take advantage of higher octanes (RON ratings) then you wont see the advantages... Makes me think that a tune in Aust will make a huge difference to the output figures if I run 98 Octane.

Why is it that America runs all its measurements different to the rest of the planet? You guys do realise that there are a lot more people on this planet that do agree to a "Standard International" (SI) setof units... Even the Poms cant agree though, they have their own Gallon... LOL! At least we speak the same language... mainly!
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Old 03-28-2013, 11:18 PM
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Quote:
Originally Posted by Jim_in_PA View Post
While I'm driving a MY12, the specifications are the same. I run 87. The place I buy most of my gas (Costco) doesn't even sell 89. I've not had any performance issues and get good fuel economy.
Lol ... Love costco gas, better prices than BJ's lol
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  #22  
Old 03-29-2013, 07:56 AM
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Re: Fuel Requirement GC 2014 V8 owners

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Lol ... Love costco gas, better prices than BJ's lol
Yea, I've even learned where the Costco locations are along my regular travel routes at this point...
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  #23  
Old 03-29-2013, 01:48 PM
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Re: Fuel Requirement GC 2014 V8 owners

I've had a 2005 "C", a 2005 GC and now a 2012 Ram all with the Hemi. I never have used the 89 in any one of them and I have no complaints whatsoever relating to performance. It used to be that 89 was only 10 cents more than 87. Now most stations around me have a 20-30 cent difference, so over time running the 89 would cost quite a bit more with no great advantage.
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  #24  
Old 04-02-2013, 05:23 AM
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I've had a 2005 "C", a 2005 GC and now a 2012 Ram all with the Hemi. I never have used the 89 in any one of them and I have no complaints whatsoever relating to performance. It used to be that 89 was only 10 cents more than 87. Now most stations around me have a 20-30 cent difference, so over time running the 89 would cost quite a bit more with no great advantage.
Any Aussie owners running on E10? Any dramas?
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