GTI fuel rating (95 RON)

[GolfTi]

Quote from the manual
'The vehicle may be filled with petrol that has a higher octane number than the engine requires. However, this does not provide any advantage in terms of fuel consumption or engine output.'

The manual is generic though, not specific to the GTI.

I'll still give it a go and see for myself.

[Johnc41]

Quote from the manual
'The vehicle may be filled with petrol that has a higher octane number than the engine requires. However, this does not provide any advantage in terms of fuel consumption or engine output.'

The manual is generic though, not specific to the GTI.

I'll still give it a go and see for myself.

Yes mate and the guy is 100% right it makes no difference

[Bill_the_Bear]

Johnc, demonstrating that higher octane fuel has no discernible effect on non variable timing engines such as the mk5 and mk6 GTI says nothing about the effect it will or will not have on a variable timing engine such as the mk7.

I will find the link later but I have read a pretty scientific long term test where high octane was shown to give benefits to variable timing.  Given that it does have an effect I'm trying to understand why it does (see my first post) and if this will apply to the mk7 or not.

[Gryzor]

Have to say, I've tried higher octane fuel in my Mk5 GTI, and in all honesty, if there is a difference, I didn't notice it.  The mood you are in on any given day you drive your car will have far more impact on consumption etc.  So yeah, for me, complete waste of cash that you'd be better off saving up to have proper engine and exhaust cleaning done.

[barrym381]

http://www.youtube.com/watch?v=gQghB4asSnI

[Bill_the_Bear]

Guys I don't think you have understood the video at all.  You keep talking about the mk5, 300hp, remaps etc... none of this is relevant.  In addition a test involving a sample of 1 has no scientific validity, even if the detection was better than the feeling of the driver!

The mk7 engine is different.  To determine if the 99 fuel will have an effect requires looking at that specific application, not the older, different engines.

High octane fuel has been demonstrated to give improvements in some vehicles (proof to follow when I get home) so the question is will it in the mk7 or not!  The video demonstrates why this is not to be assumed to be the case in all vehicles but it is equally wrong to then assume this is not the case in any vehicle.

[Johnc41]

Guys I don't think you have understood the video at all.  You keep talking about the mk5, 300hp, remaps etc... none of this is relevant.  In addition a test involving a sample of 1 has no scientific validity, even if the detection was better than the feeling of the driver!

The mk7 engine is different.  To determine if the 99 fuel will have an effect requires looking at that specific application, not the older, different engines.

High octane fuel has been demonstrated to give improvements in some vehicles (proof to follow when I get home) so the question is will it in the mk7 or not!  The video demonstrates why this is not to be assumed to be the case in all vehicles but it is equally wrong to then assume this is not the case in any vehicle.

bill it does not matter if it is a different engine, the car is made to run on 95 so there is your answer, I think you are missing the point

[barrym381]

The guy on the video makes total sense and you are wasting your money with anything more than 95. I agree I run 5 gti's on 99 then tried them all on 95. Made no difference whatsoever to driving or mileage, it's a complete waste of money.

why does r-tech ask for the car to be run on 98 after a map then 

[Jimble]

Another thing to remember with the higher octane fuels is that they're supposed to be cleaner with various additives, this is the main reason i use v power, i used BP fuel save once (one tank) and there was a noticable difference in the way the car ran, whether or not it affected power output i don't know but it felt worse.


I sometimes use Tesco momentum as well and although it feels like it runs a little smoother there is noticably more carbon build up on the exhaust tips than when using v power, these are my own observations and the reasons v power is my prefered fuel.


Oh and Texaco fuel should be banned!! Absolute rubbish!

[Johnc41]

The guy on the video makes total sense and you are wasting your money with anything more than 95. I agree I run 5 gti's on 99 then tried them all on 95. Made no difference whatsoever to driving or mileage, it's a complete waste of money.

why does r-tech ask for the car to be run on 98 after a map then 

We'll mate I have had every gti remapped and the latest was the ed35 and celtic tuning said it would make no difference. And I tried them all with 99 and 95 and it is complete and utter garbage, I booted the hole out of all my cars even with asda fuel and it was the exact same. So you can spout all your science at me, but with the 5gti and r32 I have found no difference whatsoever, so that is science enough. And my friend still has the 06 plate gti I sold him with over 100thousand miles with asda fuel and it runs perfect. So regards cleaning your engine with 99, no sorry don't see it myself