Polo GTI - Do you have to use 98 RON?

[VW GTI]

I've used V-Power or V-Power Racing for EVERY tank of fuel until last week. I used BP Ultimate and got 40kms extra before the fuel light came on with no change in driving style. I've filled up with BP again to see if it wasn't just above average for some reason.

[hkogti]

BP used to develope 104ron, but i think they know taht it will not make money on it..

Look at the fuel price now, i pays 1.79 for 98 ron most of the time, for 104ron, they might need to charge us 2.10 a litre... By looking at 2.10, no one is going to go for it.... (somehow i will....)

[VW GTI]

BP used to develope 104ron, but i think they know taht it will not make money on it..

Look at the fuel price now, i pays 1.79 for 98 ron most of the time, for 104ron, they might need to charge us 2.10 a litre... By looking at 2.10, no one is going to go for it.... (somehow i will....)

Correct me if I'm wrong... 100 RON is no better for your car than 98 RON unless it's tuned for it.

[FL00DY]

Correct me if I'm wrong... 100 RON is no better for your car than 98 RON unless it's tuned for it.

From what I've been told this is correct. Pretty sure if you talk to the various chip guys, they offer diff tunes for diff octane fuels.

[Sharkie]

Shell 100

When it just came out I asked Guy and he said it'd be good for about 2kw and 3NM without any additional tuning.

I have found that if you do not use it quickly (ie drive it all out within a few days) it seems to go off (maybe due to evaporation) and the car feels noticably slower.

[FL00DY]

When it just came out I asked Guy and he said it'd be good for about 2kw and 3NM without any additional tuning.

I have found that if you do not use it quickly (ie drive it all out within a few days) it seems to go off (maybe due to evaporation) and the car feels noticably slower.

I don't care how sensitive your arse is, you wont feel 2kw

[Sharkie]

Yep, don't really feel much of a difference with 100, but after letting it stand for a week or so, it feels more like you stuck 95 in there by accident and after 100 you can feel that is its more like 5kw down .......

I'm at the stage where if I know I'm going to be using a tank in a week or less I put in 100 and if not normal 98 goes in.

I'm guessing the ethanol in it don't like waiting around to get used and wander off and do other weird and not so wonderful things to your car

[Flaps]

I read that Shell Optimax is chemically enhanced from 95 to 98 and only has a life of 2 months at 98.

I don't always believe what I read but from personal experience I've driven 2 cars that have pinged on Optimax. Next fill up with Ultimate and all sweet.

[Guy_H]

A Shell rep posted on Ozaudi about the withdrawal of the 100 octane fuel last week:

http://www.ozaudi.com/forums/showthread.php?t=16283

[Desmo]

There was an article a while ago in the UK (EVO mag) where they tested a number of fuels in a MkV Golf GTI and a M5.

Their first piece of advice was to use a busy petrol station as they suffered a number of poor results that could only be put down to stale fuel.

I only run 98 or 100 (although V-power racing is being fazed out)

[Timbo]

My Revo tune supposedly has a map for V-Power Racing, but it seems to make very little difference on a dyno relative to 98.

[Golf Houso]

There was an article a while ago in the UK (EVO mag) where they tested a number of fuels in a MkV Golf GTI and a M5.

Their first piece of advice was to use a busy petrol station as they suffered a number of poor results that could only be put down to stale fuel.

I only run 98 or 100 (although V-power racing is being fazed out)

I've got that issue, I remember the M5 getting 541hp though using 104 sunoco fuel. I remember it also mentioning that the ECU is intuitive and changes according to the fuel quality. Pity it cost like $7 a liter over there!!!

[FL00DY]

I've got that issue, I remember the M5 getting 541hp though using 104 sunoco fuel. I remember it also mentioning that the ECU is intuitive and changes according to the fuel quality. Pity it cost like $7 a liter over there!!!

BMW's learn changes for diff fuel. Lots of MINI friends talk a lot about it. You can also reset the parameters in the ECU.

[Y2008]

affordability is not the issue here the difference is not worth the saving. The question is WHY VW have jumped back and forth between saying 95 or 98? WHY are they not clear? Is it tuned for 95 or 98? There are many possiblities but does anyone have a good answer. Some cars say 98 some say 95 some say min 95.

[VW GTI]

They all say 95. But in Europe, 95 is equal to our 98.

There is a letter from VWA posted somewhere here saying below 98 will void warranty from memory.