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Super or Regular Unleaded?

1K views 19 replies 16 participants last post by  RobbieTT  
#1 ·
As a TT Newbee,(sorry to keep repeating this fact but i feel it justifies the naievity of some of my questions) is it worth paying a bit more and putting in Super unleaded fuel?

:?:
 
#2 ·
Without a doubt, most people on the forum here use Optimax (Shell) My car has never been run on premium unleaded, it's a sin :wink:
 
#3 ·
optimax :) :)
 
#5 ·
Actually it makes a difference if you have a V6 or not. Super type fuels, optimax, ultimate and five stars, work well on most except the V6 because it has a power limiter function in the engine management system to protect the DSG box (not sure if this applies to the new V6 manuals though).

However, I still use Optimax even with a V6 DSG because I am stupid! :lol:

Jim.
 
#7 ·
jimfew said:
digimeisTTer said:
As a TT Newbee,(sorry to keep repeating this fact but i feel it justifies the naievity of some of my questions) is it worth paying a bit more and putting in Super unleaded fuel?

:?:
Actually it makes a difference if you have a V6 or not. Super type fuels, optimax, ultimate and five stars, work well on most except the V6 because it has a power limiter function in the engine management system to protect the DSG box (not sure if this applies to the new V6 manuals though).

However, I still use Optimax even with a V6 DSG because I am stupid! :lol:

Jim.
This isn't quite right. The reason high octane fuel isn't required in the V6 is because it's not a turbo and hence the compression ratios are lower and there is less chance of the the fuel mixture detonating earlier.

Due to higher compression in the turbo'd engine, it is recommended to use a higher octane (98)

nothing to do with power limiting. You can put 98ron in your v6 but it shouldn't make any difference...however the extra additives in some fuels i.e. optimax may but in a different way.
 
#13 ·
XXMetal said:
Even if you have a V6 I thought Optimax was better for you engine, I thought it had a cleaning agent.
If you believe Shell marketing :wink:

A friend actually sent me an artical from Evo or Car magazine where they had check the cycliner and valves before and after using Optimax and a 'regular' fuel and the difference did appear to be noticable. After using Optimax everything looked cleaner with less deposits.

My own personal opinion is that all petrol adheres to certain formulation standards and therefore none of it is 'bad'. It just that some may be 'better' and also more expensive. I have no qualms putting Sainsbury's finest in my V6 when I need to.

I also used 95 and 98 ron interchangeable in my old 225 and to be totally honest never noticed anything between it.

I think it's down to personal choice and there is nothing to say that putting anything other than optimax into your engine will cause it to disintegrate!
 
#14 ·
[/quote]

However, I still use Optimax even with a V6 DSG because I am stupid! :lol:

Jim.[/quote]

Likewise. :p I am trying out BP Ulimate (first fill-up since new) in my V6 DSG.

My previous TTC225 was filled up with nothing else but Shell Optimax (except for the tank which the dealer filled up at hand-over).
 
#15 ·
XXMetal said:
Even if you have a V6 I thought Optimax was better for you engine, I thought it had a cleaning agent.
.......maybe, but I was loosing 4mph over a tank of Optimax compared to 95RON and the car didn't feel as eager to pull and all this was costing me more money! I gave it up after 6/7 tanks.......

Dean
 
#16 ·
andya said:
jimfew said:
digimeisTTer said:
As a TT Newbee,(sorry to keep repeating this fact but i feel it justifies the naievity of some of my questions) is it worth paying a bit more and putting in Super unleaded fuel?

:?:
Actually it makes a difference if you have a V6 or not. Super type fuels, optimax, ultimate and five stars, work well on most except the V6 because it has a power limiter function in the engine management system to protect the DSG box (not sure if this applies to the new V6 manuals though).

However, I still use Optimax even with a V6 DSG because I am stupid! :lol:

Jim.
This isn't quite right. The reason high octane fuel isn't required in the V6 is because it's not a turbo and hence the compression ratios are lower and there is less chance of the the fuel mixture detonating earlier.

Due to higher compression in the turbo'd engine, it is recommended to use a higher octane (98)

nothing to do with power limiting. You can put 98ron in your v6 but it shouldn't make any difference...however the extra additives in some fuels i.e. optimax may but in a different way.
Hi andya,

I am now very confused as I got this information directly from Audi in Germany (I speak German). Thay clearly stated that the higher octane could make a difference but they do limit the torque to the DSG box so the effect is minimal. I also confirmed this advicce with Audi in Croydon who also stated that the high octance fuels were not going to make a difference because the torque is limited to the DSG.

I have tried Optimax in many non blown cars and it improves torque output considerably.

Where does that leave the truth?

Maybe someone could prove this on a V6 manual model using both fuels on a rolling road.

Jim.
 
#17 ·
just using regular unleaded in my V6 from whatever petrol station i go to. doesn't appear to make any difference(my first tank was super), it's still f**king fast.

used regular unleaded in my A3 Quattro Turbo as well for 3 years as well as occasionally using super becuase i was given the impression that i would get more performance out of it. If I was honest though I couldn't tell the difference. engine and performance still seem perfect after 3 years.
 
#18 ·
i was reading a newsgroup about this several years ago and some guy who swore blind he had worked in petrol chemical development for donkeys years dazzled the group with science about how actually super would give no added performance to any engine and it was just marketing. sure it was a different pertrol with different additives but in the end it didn't make your car go faster.

as i said, he quoted a lot of stuff that i can't remember (or even care to) about how different fuels work and engines etc etc. the argument was going back and forth between him and another guy who didn't seem to have all the facts.

problem is with the internet though (and most media it seems these days) you have no idea who to believe. infact, i may have just made up this post for all you know :(
 
#19 ·
You would`nt put low grade oil in your engine, so why put low grade fuel??? i definately feel the diff with Optimax 8)