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[Gubz]

Anyone here use it on a regular basics? i put one and a helf tanks through my car an she seems to be more thirsty then ever lol

[steverubberduck]

i use tesco 99, seems to run better and last longer on mine, regardless of how hard i drive it 

[Gubz]

mayb i just went to a bad station?

[Vmax]

I sometimes use the shell type - I seem to get a few more miles per tank, but nothing to write home about.

[Freeman]

Unless your engine is designed to use it not worth the extra pennies.  Octane rating is the fuel's resistance to detonation - i.e. how much pressure it can withstand before it explodes.

Only performance engines running at higher pressures need it (Nissan Skylines, some Japanese imported Subarus, etc) - using lower octane rating than recommended can cause premature detonation as the fuel can't take the pressure resulting in loss of power and economy.

Running an engine designed for 95 RON on anything higher has no advantage to power, economy, etc. as the engine can't take advantage of the extra resistance to pressure as it only runs at a certain pressure determined by the engine manufacturer - In fact it can have the opposite effect.

Unless of course you have entered the world of tuning, custom ecu's and other such dark magic

[Kevin Wood]

Unless your engine is designed to use it not worth the extra pennies....

Seconded. 95 is expensive enough anyway.

Kevin

[Gubz]

it was only 95 i put it an it was 114.9 lol

[Freeman]

it was only 95 i put it an it was 114.9 lol

114.9! Ouch! You'll be pleased to hear that I filled up today at my local Sainsbury's at 98.9 ppl and their Super Unleaded (97 RON) was priced at 101.9 ppl

Try http://www.petrolprices.com to find the cheapest petrol near you - registration is free and I think they cover NI

95 RON is standard octane for unleaded in the UK.  High octane (badged as Super Unleaded) will be 97 to 102 RON.
Examples being Sainsbury's Super Unleaded at 97 RON, Tesco Super at 99 RON and BP Ultimate at 102 RON

The marketing for super fuels seems to be based on consumer misunderstanding and the placebo effect of people thinking they are getting more power by adding "performance fuels"

Fuel companies do however justify the extra expense by saying that their super fuel contains more or better cleaning agents than standard fuel... however any benefits of these additions will be marginal at best.

Regular servicing and oil changes are the best way to extend the life of an engine

[Vmax]

Unless your engine is designed to use it not worth the extra pennies.  Octane rating is the fuel's resistance to detonation - i.e. how much pressure it can withstand before it explodes.

That's good to know - Cheers 

Only performance engines running at higher pressures need it (Nissan Skylines, some Japanese imported Subarus, etc) - using lower octane rating than recommended can cause premature detonation as the fuel can't take the pressure resulting in loss of power and economy.

Running an engine designed for 95 RON on anything higher has no advantage to power, economy, etc. as the engine can't take advantage of the extra resistance to pressure as it only runs at a certain pressure determined by the engine manufacturer - In fact it can have the opposite effect.

Unless of course you have entered the world of tuning, custom ecu's and other such dark magic

[Gubz]

according to that sight there is no super unleaded near me lol

[mars]

Only ever had 1 car which I regularly ran on super-unleaded and that was a 1.9 Peugot 205 Gti. It genuinely ran better, none of my other cars have had any noticeable difference at all

[NaughtyNigel]

I tried using Shell and BP Super unleaded in my late model 2.5 V6.

Fuel consumtion was worse, not better, and it also developed a strange missfire under load which dissapeared when I reverted to normal 95 RON.

However, I find it runs better on premium brand fuels (Shell / BP / Esso), and seems to resent being run on cheap supermarket fuels. 

Treat her as she deserves to be treated! 

[markey mark]

i run mine on tesco 99 can tell difference on miles to gallon and smoothness 

[i260]

i run mine on tesco 99 can tell difference on miles to gallon and smoothness 

I have used 97 & 99 ron on several vehicles that 'wern't supposed to take it' and in every case it has mad it tonnes smoother, getting rid of the flat spots and improving low end pick up. It even worked on my 1.4 Astra Cesaro!

You may find it takes a few tanks to work though.

[Del Boy]

Never ever use Super only use normal unleaded, don't make any difference to my car at all and its more expensive.