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        General >> Give/Need advice to/from others >> Super unleaded ?
        
(Message started by: Waglet on Sep 8^th, 2009, 10:18am)

Title: Super unleaded ?
Post by Waglet on Sep 8^th, 2009, 10:18am

Is it me or does the Scorp (24V in my case) run much better with Super unleaded (or similar)? I'm sure mine does or could it be psychological coz I've spent more money and want it to go better? :-/

Title: Re: Super unleaded ?
Post by gozz on Sep 8^th, 2009, 10:28am

Waglet.
I suppose a higher octane rating may produce a slightly bigger bang therefore a little more power ?
Enter the chemists and physicists to blow my simple theory through the exhaust ;D
GOZZ.

Title: Re: Super unleaded ?
Post by scorpio_man on Sep 8^th, 2009, 2:48pm

hi there

i never saw any gain with my scorpio, but it was on/set up for LPG (smaller plug gap).

however, with the wife's Honda civic 1.5 vtec engine, you can get a good 5 mpg difference. it is a very revvy engine, though.

hth

Title: Re: Super unleaded ?
Post by Tekno on Sep 8^th, 2009, 3:24pm

eec-v has ability to adjust ignition advance for different octane..
I just filled tank with 98 but I don't notice any CLEAR difference to 95. I don't say that it doesn't affect to power, but if it affects, gain must be very very small.
I'm also trying to test if it has any affect to fuel comsumption. (need to fill few times before I can make any statements about consumption graphs)

Title: Re: Super unleaded ?
Post by Tons_of_fun on Sep 8^th, 2009, 5:00pm

My cossie LOVES Shell V Power ;D. Throttle responce is much crisper, but thanks to our wonderfull thingy turp....er i mean fuel duty i can only JUST afford regular unleaded :'( :'(

Title: Re: Super unleaded ?
Post by Pegasus on Sep 10^th, 2009, 10:26pm

made no difference to mine - even on measured long motorway trips.

Made a lot of comparisons with measured distances - I might post 1 day but suffice to say I'm sticking with 95 octane

Title: Re: Super unleaded ?
Post by Matt on Sep 20^th, 2009, 9:05pm

the 24v and the 500 love the stuff

Title: Re: Super unleaded ?
Post by Tekno on Oct 30^th, 2009, 10:58pm

1. Emptied fuel tank full of 95 octane -> 9,32 litres per 100km
~~~ winter tires ~~~
2. Emptied fuel tank full of 98 octane -> 9,62 litres per 100km
3. Emptied fuel tank full of 95 octane -> 10,06 litres per 100km
4. Emptied fuel tank full of 98 octane -> 9,7 litres per 100km

Difficult to say if octane affects fuel consumption because that already has some variation because of driving router, weather, tyre change, traffic amount etc.

Few more refuels needed, definitely

Title: Re: Super unleaded ?
Post by adam on Nov 6^th, 2009, 2:25am

I have tried this a few times, filling up with 98 Octane. It does appear to improve throttle response.
It depends how "hard" you wish to drive. Overall little difference, (apart from financial loss), is seen at all.

However, if you avoid the blended fuel (Tesco, Asda, etc....) and use 95 Octane (Esso etc..) refined fuel.
Response levels are better and price per litre are similar. ;)

Title: Re: Super unleaded ?
Post by mondeoman on Nov 7^th, 2009, 7:53pm

From tests conducted in the past on higher octane fuel you should see a better mpg. The problem is the cost of the fuel out weighs the mpg improvement, so you are better sticking with the regular 95 octane fuel.

Title: Re: Super unleaded ?
Post by Tekno on Nov 7^th, 2009, 9:04pm

Here in Finland 98 octane is only 0,02€ or 0,03€ more per litre..

Full tank of 95E = 87,05€
Full tank of 98E = 88,985€

so price doesnt count much...