Super or regular?

[Teutonic_Tamer]

aye..mine is an AXX and has 98 specified on the fuel filler cap. Must be the early cars (mines a March 05).

Well mine is a 2007 model year with the BWA - and that has the 98 RON sticker!

[Teutonic_Tamer]

Well now thats the difference we are talking about. The mk5 had the fsi engine and the mk6 has the tsi.

FSI . . . TSI, tomaeto . . . tomarto - basically the same technology, but just different names.  Just like Audi use 'quattro' to describe 4wd - weather it has full time permanent Torsen-based 4wd - or part-time 'on-demand' Haldex-based 4wd.  Incidentally, whilst VW call these new engines 'TSI', Audi still call them 'TFSI' . . . go figure!!!

If it were in anyway possible for VW to get better mpg out of the mk6 gti then im sure they would have done it. 95 or 97ron wont make any difference if its set to run on 95

I think VW are now able to achieve maximum economy using 95 RON - max power is another issue though! 

[Teutonic_Tamer]

TSI is just the new acronym VW have given for the 2.0T engine name. To my knowledge the new engines are still technically FSI. Dont quote me on this.

Yup, spot on there Alan!

[jase16gti]

 :embarassed: iv only skimmed this thread, but iv tried premium fuel all be it only 97 ron. i didnt notice any difference. should i have!and i drive a leon cupra not a mk6 gti

[Teutonic_Tamer]

The fact your Pug wasn't designed to run on the higher stuff is also a factor.

And it's so easy to be caught by the placebo effect when trying different types of fuel, as highlighted above.

I totally agree. Its just habbit now to use 99.

I don't know what the Pug was designed to use, it's a GTi 2.0 litre 6-gear job.  And it showed the Golf Mk IV a very clean pair of heels. 

But the Pug probably only weighed the same as two of the Mk4s alloy wheels!!  The Mk4 GTI was well-known for being a lardy overweight mofo.  Just think who is fastest running 100metres - Lewis Hamilton or John Prescott?  Actually, if a pie shop was at the finishing line, then Prezza would prolly win!!! 

Would you use the 98 RON in the Mk VI, and if so why?  (Other than habit.)

If the sticker and manuals specifically stated 95 RON, and the car was standard (not remaped or owt), then any decent 95 RON juice would be fine.  No supermarket standard unleaded though!

[Teutonic_Tamer]

:embarassed: iv only skimmed this thread, but iv tried premium fuel all be it only 97 ron. i didnt notice any difference. should i have!and i drive a leon cupra not a mk6 gti

The 1.8 20v Turbo has traditional manifold sited injectors, not direct fuel injection like FSI engines use - and I don't think was specifically OEM mapped to use 95 RON - which would explain why you didn't feel any benefit.

EDIT: corrected wrong RON figure!  :embarassed:

[Rolfe]

If the sticker and manuals specifically stated 95 RON, and the car was standard (not remaped or owt), then any decent 95 RON juice would be fine.  No supermarket standard unleaded though!

And how do you tell the difference?  Just never buy at a supermarket?

Rolfe.

[danny_p]

ummm somethign i've noticed reading through this,  no one has mentioned nicosil.

quite a few enignes now have nicosil coated cylinders / liners.   nicosil dosent like sulfer at all.   run an engine with nicosil liners on povery speck fuel and it attacks the coating on the liners, once thats gone they wear like crazy. problem come is that you can't fix it  you canb rebore them bit no way of reapplying  the coating so you need to replace the liners or the whole block as i don't think vw use wet liners at all   

[Teutonic_Tamer]

If the sticker and manuals specifically stated 95 RON, and the car was standard (not remaped or owt), then any decent 95 RON juice would be fine.  No supermarket standard unleaded though!

And how do you tell the difference?  Just never buy at a supermarket?

Rolfe.

Yeah !!!  Most supermarkets don't sell high octane super plus anyway.  The only two who do are Sainsburys (97 RON) and Tesco (which is actually 99 RON - and has been proven to be the best juice in the UK - but then Tesco are a major shareholder in Europes largest independent oil company - www.GreenErgy.co.uk).

So if you are keping it in standard tune, then just use the standard unleaded, but from the 'major' oil companies (and Tesco would still be OK).  Just avoid Asda, Waitrose, Sainsburys stuff, along with any 'no-make' independent petrol stations which you do seem to find north of the boarder!

[Teutonic_Tamer]

ummm somethign i've noticed reading through this,  no one has mentioned nicosil.

quite a few enignes now have nicosil coated cylinders / liners.   nicosil dosent like sulfer at all.   run an engine with nicosil liners on povery speck fuel and it attacks the coating on the liners, once thats gone they wear like crazy. problem come is that you can't fix it  you canb rebore them bit no way of reapplying  the coating so you need to replace the liners or the whole block as i don't think vw use wet liners at all   

Errrrr, but that comment only applies if you are in Russia or Zimbabwe, because in the UK and the EU, ALL petrols by law can only be "Ultra Low Sulfur Petrol" (ULSP) - so not an issue!