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Author Topic: Super or regular?  (Read 44255 times)

Offline AlanD

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Re: Super or regular?
« Reply #40 on: 16 July 2009, 13:33 »
Note that Optimax was 98 (and now redundant). V-Power is 99 :D
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Offline Rolfe

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Re: Super or regular?
« Reply #41 on: 16 July 2009, 13:42 »
Quote from: Egbert Nosh on 16 July 2009, 13:08
The gadget show ran a test comparing supermarket, BP ultimate and Shell Optimax on three cars, a slow french car, a Mk5 GTI and a Subaru.  The test is here...

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

I'll not spoil it by telling you the results.

Oooh, I like being educated!   :smiley:

So that's the info on performance boosting.  Great scientific trial, as a scientist, I like this!

So what about the "cleaner engine" stuff, and the claims about better MPG?  Anybody have anything similar?

Rolfe.
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Offline AlanD

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Re: Super or regular?
« Reply #42 on: 16 July 2009, 13:45 »
The cleaner engine claims comes from the fact that have cleaning agents in the fuel which should keep your engine cleaner. A cleaner engine is a more efficient engine.
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Offline Rolfe

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Re: Super or regular?
« Reply #43 on: 16 July 2009, 14:12 »
Quote from: AlanD on 16 July 2009, 13:45
The cleaner engine claims comes from the fact that have cleaning agents in the fuel which should keep your engine cleaner. A cleaner engine is a more efficient engine.

So, in order to benefit from that, is it necessary to use the expensive stuff all the time, from when the engine is new?

Rolfe.
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Offline AlanD

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Re: Super or regular?
« Reply #44 on: 16 July 2009, 14:29 »
I wouldn't say so. If you haven't used it from new and then start using it after a few months use its gets through the system, your ECU adjusts etc etc

As its already been said MK5 and MK6 (GTIs) are designed to run on higher octane fuel so should really be run on it if you want to get the best out your car.
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Offline Rolfe

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Re: Super or regular?
« Reply #45 on: 16 July 2009, 15:14 »
Even if it improves fuel economy, I think it would be hard for it to improve it enough to compensate for the higher price at the pump.  I could be wrong though.

Rolfe.
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nige_s

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Re: Super or regular?
« Reply #46 on: 16 July 2009, 15:30 »
Where can I get one of those butt dynos that notice an apparent 1-3 bhp increase after using a different fuel. 
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Offline AlanD

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Re: Super or regular?
« Reply #47 on: 16 July 2009, 15:32 »
Quote from: Rolfe on 16 July 2009, 15:14
Even if it improves fuel economy, I think it would be hard for it to improve it enough to compensate for the higher price at the pump.  I could be wrong though.

Rolfe.

Horses for courses really. Depends if you mind paying a little more or not  :undecided:
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Offline simonpolly

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Re: Super or regular?
« Reply #48 on: 16 July 2009, 15:37 »
So from that video the engine management needs to adjust to the higher octane petrol being as they reset the engine mangement,if you were to use the lower octane and the switch to the higher how long before the engine adjusts ?.
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Offline Egbutt Wash

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Re: Super or regular?
« Reply #49 on: 16 July 2009, 15:41 »
The ICI petrol brand was really just a way for ICI to get rid of unwanted production from the aromatics plant at Wilton.  Often the petrol around Teesside, marketed as two or four star was all well over 104 octane.

It took my ECU about 15 miles to adjust between Morrisons and Asda petrol.
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