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Old 02-28-2013, 03:23 PM   #1
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What RON Fuel Do You Use

My handbook recommends the use of 98 RON fuel which I take to mean Super Unleaded and that's what I've put in for the 4,000 miles I've knocked up since October. Does everyone else use Super?
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Old 02-28-2013, 03:58 PM   #2
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I've been doing likewise and also used the Momentum Premium Unleaded at Tesco
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Old 03-01-2013, 01:14 AM   #3
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95 ordinary unleaded for me.
Anything cheap :-O
*As long as your car is tuned for it* ... put in what you decide... yes Forum people?
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Old 03-01-2013, 08:55 AM   #4
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I know the SS (V8) in the 'states has to use premium fuel. However I don't know wether that has been adjusted for the EU spec version. Mine is is a US spec girly V6, so I only need to put el cheapo petrol in .

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Old 03-02-2013, 01:41 AM   #5
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The handbook suggests that 98 should be used. 95 can be used but can result in poorer acceleration and possibly knocking (pinking to you and me).
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Old 07-23-2014, 08:21 AM   #6
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I'm using 95 on my new car thought it would be fine with that. What do you guys think?
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Old 07-23-2014, 09:37 AM   #7
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I've always used Shell vPower Nitro+ which I believe is 99 on my V6, reset the ECU to hopefully get the most out of it, at least if anything it's got some more lubricant in it, can't see it doing any harm.
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Old 07-23-2014, 09:57 AM   #8
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Cool thanks for the reply, but can the v8 run on the 95 or is it safer to run 99
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Old 07-23-2014, 10:07 AM   #9
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Quote:
Originally Posted by Kabz r35 gtr View Post
Cool thanks for the reply, but can the v8 run on the 95 or is it safer to run 99
There is a significant difference in performance (in my opinion) by using "super" or 98.

If you run the vehicle on just 1 tank of 95 the ECU will adapt and performance will drop. You then need to do a fuse pull to restore maximum performance. After you've done this you will notice a difference. BTW - this only applies to the V8 L99 or LS3 engines and doesn't do anything for the V6's.

Here we go;

http://www.camaro5.com/forums/showth...ight=fuse+pull
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Old 07-23-2014, 10:43 AM   #10
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I've got an OBD2 reader for my ECU, I wonder if there's anything that I could actually measure to compare the use of lower octane on a V6
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Old 07-23-2014, 10:55 AM   #11
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I've got the L99 so if there's a performance diffrence I'll be doing it.
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Old 07-23-2014, 11:02 AM   #12
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To rick, how long did you leave the fuse out for and how many tanks on 99 did you use before the fuse pull?
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Old 07-24-2014, 01:42 AM   #13
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Quote:
Originally Posted by Kabz r35 gtr View Post
To rick, how long did you leave the fuse out for and how many tanks on 99 did you use before the fuse pull?
Fuse was out overnight. I would suggest letting your tank get as low as you dare and then fill up with super before the fuse pull. If you can wait long enough then maybe after a second tank of super (wouldn't be necessary to get the tank so empty that way - wouldn't want to be stranded out of fuel !) Try after the first option, you can always fuse pull. a second time if you felt it necessary.
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Old 07-26-2014, 08:38 PM   #14
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Thanks rick.
I'll be trying it soon.
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Old 08-15-2014, 07:00 PM   #15
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I'm really sceptical of this but kind of want to try it. I use both 95 and 98 in mine and I can never really feel a difference in power (which leads me to think that maybe mine does have the problem), but then at Santa Pod I've run a 13.289 on standard road tyres with far too much pressure in them and not much practice - that's only a tenth off the fast list times. Surely if the issue is that bad I'd be running in the 14's?

Has anyone in the UK tried it in an LS3 motor? Have you had any issues afterwards?

P.S. I never use Momentum 99 in the Camaro anymore after 2 of my other cars had had major issues running it. My 330ci actually broke down and I had to mix the fuel with some Shell before it would start again and the Mazda CX-7 hiccups at 2,400rpm.

Anyway, please let me know.

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Old 08-26-2014, 01:43 PM   #16
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Higher octane fuel does not make more power. Lower octane burns faster and with higher compression you can get pre-ignition. Higher octane allows you to run more compression and the higher compression allows you to make more power. Since I have a cam, and my tune is set up for U.S. 93 - I have to run 98 here. UK 95 = US 90 and UK 98 = US 94...
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Old 08-26-2014, 03:53 PM   #17
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Quote:
Originally Posted by racesloth View Post
Higher octane fuel does not make more power.
Maybe not but the changes that the ecu makes when you're running lower octane can make less power.

There's no doubt that after running lower octane fuel, a refill with higher octane followed by a fuse pull equals more umffff. Does for me anyway.
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Old 10-11-2014, 08:00 PM   #18
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Hi all not sure about UK spec cars but in the US octane levels seem lower and the premium fuel here is 93? I don't know if there's any difference to the rating compared to us to UK ( well their gallon isn't the same amount as in the UK) so I wouldn't want to take anything for granted.

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Old 10-21-2014, 03:23 PM   #19
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The LS3 was made to run US 93 (Premium) octane gasoline. So you are okay running UK 98 and can probably get away UK 95 for most driving situations. Vengance racing told me I could use UK 95 in mine as long as I didn't go over 3500rpms (.620 lift and 230ish duration @.050 cam) - so in a pinch you can get around. Stock cam even more so...
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