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Old 25 August 2005, 16:28   #11
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And don't forget that if you use a different octain fuel than that used during your tune up or service you might be risking your ignition timing being off.
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Old 25 August 2005, 16:35   #12
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Iíve used it in my bike a few times, & yes I do get a few more miles to the gallon.
I put this down to the extra performance, so to stop pulling wheelies Iím not wrenching the throttle back so quickly. BUT as soon as I get used to it the grin factor sets in & Iím back to normal mpg.
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Old 25 August 2005, 16:53   #13
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I believe the zapcat racers use it for racing, so I guess it must give better performance. They have 50hp Tohatsu carb motors with boston reed valves.

Tim
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Old 25 August 2005, 17:42   #14
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Well it looks like the proof of the pudding and all that. Going to Dunkirk over the weekend and dont want to tempt trouble, but upon my return will fill 1 tank with normal and the other tank with super. Will post the results as soon as.

Bilge Rat: Go on rub it in and yes you will see me mid channel... changing tanks.

Thanks to all.
Tim'mers.
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Old 26 August 2005, 04:56   #15
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Does the new Verado 275 ONLY run on Super Unleaded?

I thought MR HMS was banging on about that in his mag.

Chris
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Old 26 August 2005, 15:02   #16
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interesting thread this... I just 'accidentally' filled up with super unleaded (98 octane..) last week - and I thought there was a noticible difference for the better (on my old Yam 50) .. but I was wondering if it had been my imagination... (perhaps trying to justify paying 1.68 euro for it on a lake in France!!...)
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Old 27 August 2005, 02:49   #17
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Quote:
Originally Posted by Hightower
And don't forget that if you use a different octain fuel than that used during your tune up or service you might be risking your ignition timing being off.
very true, all depends on ur engines, i drive a fastish jap motor, its original speck was designed to run on higher octane fuel from its home country than we have here, the timing and fuel/air mixture is then compensated to run on the minimum recommended 95ron for uk cars. The highest octane roadside fuel is currently optimax (about 98ron) and then esso etc at 97ron or there abouts!!! one tank of optimax makes little difference to the motor but after three or four it really starts to brighten up. Switch back to cheap stuff and its performance lags for a few tanks until the ecu has compensated for shite fuel again! But i was once told that uk cars dagy dustbins and vauxhalls etc are happiest with the 95ron as thats what theyre made to run on out the factory!
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Old 27 August 2005, 03:43   #18
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That's interesting Rogue "Rock n Roll" Wave,

I stick it my old Aston with which has Weber carbs...any deteremental effects there do you think?
I neither know or give a shit about cars!
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Old 27 August 2005, 07:55   #19
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Well you should - most modern 4 stroke outboards are basically car engines and I believe the Verado is also based on a car block.

Higher octane will help most engines if they are set up for it but many other factors to take into account - for example compression ratio etc.

Used top be the case that you could buy 5 star petrol - think it was about 105 octane!!!

Despite what most people think proper leaded petrol has NOT been banned - just restricted supply. Ther is a British company still producing it - and it's nearly 100 octane - that's what you need for your Aston!!!

http://www.bayford.co.uk/leaded_petrol.asp

Still wish I could get hold of some petrol from WWII - Spitfires ran on 150 octane stuff............
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Old 27 August 2005, 07:57   #20
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Thank you Codprawn,

I shall investigate.
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