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Has anyone tried using bp 102 octane fuel in there cars over the usual 99 ron

Cheaper to use a good octane booster.

My line of thinking is that petrol degrades over the course of a few weeks + months.
102 RON is ridiculously expensive, not many people buy it, so it will be in the storage tanks for a while.

You'd need to reset your ecu before filling up, or use several tanks before the ecu has adjusted the timing sufficiently. If you are using it regularly it might be cheaper just to remap your car, remove cats etc...

^^^ Yup.
i have used it, and TBH, it was good, but noticably better than 99+octane booster (nos) Nah. and at £2.40ltr, it can stay in the pump. false economy anyhoo.
a bottle of Nos does 40ltrs for £10.00, this will increase normal 99 by "upto 3 points". Now I am no petrochemist, and i do not profess to know how the OB's work, but they undoubtedly do.

just use them sparingly, not every tank full.....

How is the ECU reset. Disconnect battery for 90 seconds or can be done with VAGCOM?

The ECU adjusts to the fuel automatically in a matter of milliseconds as far as I know.

There was a long thread on this a few weeks back - most of the "reset" options are matters of urban myth!

Dave

tbh, this whole reset thing is a load of tosh IMO

just drive the car hard for 5 / 10 mins, and it will be enough to adjust the ECU.

After driving like I stole it for 10 mins, it will be more responsive and change down quicker and stay in gear longer

then, have 10 mins of driving like a granny, and it will turn into an unresponsive fat lump, until you put your footdown !!

I did wonder whether the car 'learns' the driving style or not. Surely if you put your foot down then the car will respond as its designed to do and not what it thinks you want to do due to previous driving style!!!

Are you saying that it DOES learn your driving style? I.e. I usually drive it very reserved to/from work each day, mainly for fuel efficiency but also as there is a time and a place and in heavy traffic there is just no need. Then maybe at the weekend the foot gets a little heavier at times I would want it to repsond according to how I am pressing the pedals etc not how it thinks I want it to react due to my previous 5 days of driving.

Nope - it doesn't learn driving style per se.

It does however adjust the fuel mix based on what fuel it is actually getting and the various sensors on mixture, anti-knock, lamda etc.

A good "blast" just clears out the system, removes any residual coking from the plugs etc IMHO.

Dave

davidkoulakis wrote:tbh, this whole reset thing is a load of tosh IMO

just drive the car hard for 5 / 10 mins, and it will be enough to adjust the ECU.

After driving like I stole it for 10 mins, it will be more responsive and change down quicker and stay in gear longer

then, have 10 mins of driving like a granny, and it will turn into an unresponsive fat lump, until you put your footdown !!

That doesn't affect engine power though. What you are describing is the DSP (Dynamic Shift Program).

"5-speed HP-24 automatic transmission with Tiptronic® (steering wheel control) and DSP (selects from over 200 shift programs to match driver needs), hill detection capability and new "Sport-mode" setting. "

Rupert wrote:

davidkoulakis wrote:tbh, this whole reset thing is a load of tosh IMO

just drive the car hard for 5 / 10 mins, and it will be enough to adjust the ECU.

After driving like I stole it for 10 mins, it will be more responsive and change down quicker and stay in gear longer

then, have 10 mins of driving like a granny, and it will turn into an unresponsive fat lump, until you put your footdown !!

That doesn't affect engine power though. What you are describing is the DSP (Dynamic Shift Program).

"5-speed HP-24 automatic transmission with Tiptronic® (steering wheel control) and DSP (selects from over 200 shift programs to match driver needs), hill detection capability and new "Sport-mode" setting. "

So yes, it will respond differently (read more lethargically) if you've been pootling around. It takes a while to realise you've changed your driving style, then it will be more keen to change down and hold it in gear for longer. Edit : didn't mean to quote myself.

delco wrote:Has anyone tried using bp 102 octane fuel in there cars over the usual 99 ron

One thing I would be slightly paranoid about would be that because it is so expensive, people don't buy it very often, so whenever you did actually buy some, it would be pretty stale and probably not still have its 102 octane rating anymore. Just my 2p..

Rupert wrote: What you are describing is the DSP (Dynamic Shift Program).

"5-speed HP-24 automatic transmission with Tiptronic® (steering wheel control) and DSP (selects from over 200 shift programs to match driver needs), hill detection capability and new "Sport-mode" setting. "

yes, thats what I meant

isnt this the same as the "re-setting" ecu thing people are going on about, to wake up the beast, as opposed to mystically unleashing more horses

Dave is right. There's no point in resetting the ECU, it's adjusts quicker than you can say "my god that fuel is overpriced".

Rupert, that sounds like a quote from wikimisinformation. My car certainly doesn't have hill detection.

Shoppinit wrote:Rupert, that sounds like a quote from wikimisinformation. My car certainly doesn't have hill detection.

It's from (what looks like) an official 2003 Audi RS6 equipment list for the US market, but I can't see why it would be different for us.
By hill detect, they mean it won't roll back on a hill. Mine doesn't.


Edit: It's in the downloads section of this very website!

http://rs246.com/downloads/AudiRS6C5/Do ... S_Spec.pdf