Super or regular?

[Teutonic_Tamer]

One of our users commented that using higher octane fuel than your engine requires actually gives no benefit and may be a waste of money.

True.  Which is why that BP 102 Ultimate is an utter UTTER rip off.

This is because virtually NO engines require 98 RON over 95, and the market for 'super' fuels seems to be based on people's misunderstanding of octane ratings and the placebo effect of filling up with 'more powerful' fuel - making motorists think their engine is running better in some way.

<cough> Horsesh!t ! <cough>

Did you steal that from the PetrolPrices.com website.  Because that is BS.  Virtually ALL direct injection engines need high octane juice, as do 'high performance' variants of normal engines, such as M3s, and ALL Volkswagen Group V8 engines, along with most of their V6s, and all of their old skool turbo motors!!!!

What do the fuel companies say then, to justify the "increased power" claims for the super grade fuels? Some companies say that while all fuels contain cleaning additives, 'super' fuels contain more or better detergents to keep the injectors cleaner than standard fuel. Others say the fuel is a few percent denser which gives slightly more power per litre. These benefits may be marginal though in comparison to the extra cost involved so it is worth ensuring that your engine will actually benefit before filling up.

Some engines actually do need higher octane fuel, such as race engines with very high compression and some turbocharged engines, such as the import version of the Nissan Skyline. Also, a few vehicles, such as the new BMW K1200R motorbike, can sense knock and adjust their engine tuning to take advantage of higher grade fuels. Another user commented that the 2004 BMW 330 also does this, according to the driver's handbook it makes 231 BHP on 98 octane and 221 BHP on 95. This ability is apparently widespread amongst German performance cars using Bosch / Siemens electronic engine controls.

You have, youv'e ripped that straight from the PetrolPrices.com site.  If you are gonna breach copyright like that, at least be decent enough to acknowledge where you stole it from! 

[Rolfe]

VW Golf GTi Mk VI brochure.  Page 24.
Technical specification notes.
04)  Thanks to the knock control, unleaded four star (at least 95 RON) can be used instead of unleaded Super Plus.  In order to achieve maximum fuel consumption benefits on the TSI engine, Ultra Low Sulphur Petrol (ULSP) must be used.

So, it says 95 RON can be used.  It says nothing about whether there's any extra benefit to be gained from 98 RON.  Why wouldn't they say, if that was the case?

Rolfe.

[Teutonic_Tamer]

Mk5 tho, not mk6, but hope it helps anyone anyway!

Hmmmm . . . that is different to my Mk5 GTI - mine says 98 RON.  The part number for the sticker is '1K0 010 350 S'.  The part number from your sticker is ONLY meant for the 1.4 FSI CAXA engine - which defo aint the GTI engine.  Looks like Fritz - the Wolfsburg sticker applier had a bad day!

[Teutonic_Tamer]

Strange how some MK5s say 95 and others say 98?



Note mine says Super PLUS Unleaded where as yours only says Super Unleaded. Strange . . . . .

Yup, that's the correct one for the Mk5 GTI!

[Teutonic_Tamer]

So from that video the engine management needs to adjust to the higher octane petrol being as they reset the engine mangement,if you were to use the lower octane and the switch to the higher how long before the engine adjusts ?.

It will take a good few tanks for it clean out any of the old crap and for your ECU to start sorting itself out.

That depends on what you mean.  The ECU constantly adjusts the timing based on readings from the knock sensor, so will instantly adjust as soon as some poverty-spec fuel reaches the injectors.  But if you are talking about how long it takes the ECU to actually 'learn' a 'default' setting, then it is usually just one or two cycles of the ignition.

[Teutonic_Tamer]

i suppose there is no point in using it every now and then,sounds like you don`t get the benefits unless you use it all the time.

Now and again is fine.  You never feel any power loss with the higher octane stuff.  You sometimes do with the 95 RON, but not often enough to justify the extra trouble and cost, unless you have some special roads.

You automatically knew this 'power loss' was the petrol ? I thought the whole point of using super is to 'theoretically' give you more, didnt think the standard stuff dropped power in your car, I would have though it just didnt give you anything extra.

Huh - WTF?

Of course lower octane fuel will drop the power!  Using higher octane fuel (in a car with an OEM map) will NOT give you more power.  You can only get one pint of milk in a one pint bottle!

[Teutonic_Tamer]

Id take what Egbert Nosh says with a pinch of salt

He does talk sense sometimes! 

[Teutonic_Tamer]

Just to clarify for those of you who dont know....

the 1984cc engine is not in fact the 1984cc ‘TFSI’ engine found in the mk5 GTI but instead the new 1984cc ‘TSI’ engine from the Scirocco. It’s got an extra 10bhp over the mk5 (and the Scirocco for that matter), taking the new GTI up to 207bhp between 5300 and 6200rpm. Peak torque remains at 207lb ft but arrives fractionally earlier at 1700rpm and is held all the way to 5200rpm.

 

You sure about that fella? I thought the MKVI engine was different to the 'roc?

Nope - the Mk6 GTI engine is identical to the current 'Rocco, albeit in a slightly different state of tune.  They are both Audi-developed engines, with timing chains rather than belts, VVT on both cams, and use 'valvelift' - http://en.wikipedia.org/wiki/List_of_Volkswagen_Group_petrol_engines#2.0_TSI.2FTFSI_132-155kW

[Teutonic_Tamer]

Just to clarify for those of you who dont know....

the 1984cc engine is not in fact the 1984cc ‘TFSI’ engine found in the mk5 GTI but instead the new 1984cc ‘TSI’ engine from the Scirocco. It’s got an extra 10bhp over the mk5 (and the Scirocco for that matter), taking the new GTI up to 207bhp between 5300 and 6200rpm. Peak torque remains at 207lb ft but arrives fractionally earlier at 1700rpm and is held all the way to 5200rpm.

 

You sure about that fella? I thought the MKVI engine was different to the 'roc?

tbh im not sure about the rocco, but know that it is definately different from the mk5. Source was Evo so I expect them to know what they are talking about

Yeah, rite . . . just like their 'wholly unbiased' tyre test.    Evo journos are no better than Max Power muppets - they just get better toys to play with!    Even Volkswagen Driver don't always get things right! 

[Teutonic_Tamer]

I think it's different from the Roc but apparently the MKVI lump is the EA888 or something like that? Revo said that engine has been used in the USA for the last year or so in Audis. I think that's what he said.

Vague or wot eh?

Correct, sort of.  It is an all new engine developed by Audi, and first used in European Audis.  But a few of the very last Yankie Mk5 GTIs also got this new engine.  It then went in the new Rocco, and then the Mk6 GTI.