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BigAl
P4
Joined: 06 May 2003
Posts: 2995
Location: U.K Surrey
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 Posted: Wed Jul 02, 2008 10:26 am Post subject: super unleaded fuels, is it worth it in our 33's? |
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shell optimax, anyone use this? Does it make any diffference? a friends girlfriend runs this on her  toyota yaris and has noticed better fuel consumption that negates the price difference and performance increase.
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x2 33 16v
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john 33_16v
16 Valve
Joined: 27 May 2005
Posts: 1406
Location: herts, uk
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| Posted: Wed Jul 02, 2008 10:43 am Post subject: |
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I sometimes use Vpower as they now call it in the 33, and i think it runs a bit better, but it's probably my mind trying to justify the expense.
I used a few tankfulls to get the toy Ferraris for my son - they're really good!
During recent petrol supply probs i had to put Vpower in the Clio as 95ron had run out. I think it did go a bit better.
John
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Rich B
Alfa 33
Joined: 19 May 2003
Posts: 386
Location: Southampton
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| Posted: Wed Jul 02, 2008 4:46 pm Post subject: |
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| I always use super unleaded in my car as it goes so much better when I use it and also the fuel economy is much better (not that I'm old enough to worry about such trivial things!!). |
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paulhide
P4
Joined: 20 Dec 2003
Posts: 1607
Location: Oh Beautiful Billingham
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| Posted: Wed Jul 02, 2008 5:24 pm Post subject: |
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The fuel will make more of a difference for carbed cars as the fuel injection cars have ignition advance set to run with lambda probe at 91 or 95RON or without at 95 or 97RON depending on which relay is used.
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Oggie
Green Cloverleaf
Joined: 06 Mar 2008
Posts: 811
Location: Whitehill
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| Posted: Wed Jul 02, 2008 8:09 pm Post subject: |
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I use mega lead  . nah v power for me....its good but a little expensive and the garage has a huge selection of top titty mags, definitely worth a second look on the way out 
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Admin
Site Admin
Joined: 19 Feb 2003
Posts: 1223
Location: Stafford, UK
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| Posted: Thu Jul 03, 2008 11:05 am Post subject: |
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Hi
Unless you manually adjust the timing (either with the relay like device, or on a carbed / early injected 33 but moving the distributor) the higher octane rating will make zero difference to the 33.
However the claims for vpower, etc, are not just based on the octane rating.
All the best
Keith
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