Higher octane unleaded...

[fellsteruk]

Hi guys need some help as I think I am going mad...

 

So I have been using super/premium unleaded in the zed and last time I filled up I was sure it said 98 octane but today in esso theirs was 97, so I went on a little drive and all the supermarkets and bp was selling 97.

 

Have I imagined this 98 fuel? Who bloody sells it? Wait something is telling me you can buy 99 am I off my head?

Edited August 10, 2013 by fellsteruk

[The Chubby Ninja]

tescos sell 99

[OsakaBen]

Tesco an shell supreme is 99, esso 97, bp 98

[spursmaddave]

97/98/99 there is feck all difference mate.....

[KyleR]

Tesco an shell supreme is 99, esso 97, bp 98

 

BP is 97

[fellsteruk]

97/98/99 there is feck all difference mate.....

 

Just the price... Lol

 

To be honest I put diesel in my everyday car so use to paying 1.50/litre so the few extra pence doesn't bother me but I serious thought I have imaged it... Am half crazy anyway, I think nismo badges are cool, need I say any,ore

 

Thanks for the posts

[DoogyRev]

Shell (Canada) 102 RON

 

[fellsteruk]

Shell (Canada) 102 RON

 

 

Bet the zed loves that

[DoogyRev]

Shell (Canada) 102 RON

 

 

Bet the zed loves that

 

It would do if I had one

 

[Wasso]

Shell (Canada) 102 RON

 

 

Bet the zed loves that

 

It would do if I had one

 

 

Yeah Jim when are we going to see a Zed on your driveway?

[DoogyRev]

Shell (Canada) 102 RON

 

 

Bet the zed loves that

 

It would do if I had one

 

 

Yeah Jim when are we going to see a Zed on your driveway?

 

When you give me $60k for a new one

 

 

(i'm working on it )

[spursmaddave]

I think he will end up getting something cooler than a Zed

[DoogyRev]

I think he will end up getting something cooler than a Zed

 

 

P.S First time I used that smiley

[spursmaddave]

I think he will end up getting something cooler than a Zed

 

 

P.S First time I used that smiley

 

 

Not relevant but I don't think I have used that one before.....

 

Anyway I say Stang > Zed

[wmr1980]

I always thought the MON rating was more important than the RON rating. However, they never really tell us what the quality of their fuels are - but since they are all ISO / BS standards I guess that they have to sell them at that quality.

[Terence Bower]

Germany has 102 in just about every fuel station!

[A9H-RX]

Am told Tesco 99 isn't actually 99 octain and contains a lot of chemicals?

 

V-Power is way to go, 98 mostly but can be 99 in some garages

[WhackyWill]

You can always use octain booster.

 

There is a product called Rooster Booster we used to use in our racing cars.

[wmr1980]

Is it cost effective? And does it make much of a difference? I know on FI cars with a remap octane boosters have shown to make a marked improvement, but on an untuned unmapped car does it make a tangible difference?

[WhackyWill]

Its not cheap save it for special occasions like a meet, or just every second tank full.

 

Yes there is a noticeable difference in "grunt".

[wmr1980]

Interesting, thanks for the info.

[A9H-RX]

Is it cost effective? And does it make much of a difference? I know on FI cars with a remap octane boosters have shown to make a marked improvement, but on an untuned unmapped car does it make a tangible difference?

 

Using high octain improves MPG as well as small margins of performance unless FI in some cases.. Its a cleaner fuel as well so helps maintain the engine.. I use high octain as normal fuel for all my cars unless I'm driving diesel or not so sporty car..

Edited August 8, 2013 by A9H-RX

[Lincolnbaggie]

Sorry to be pedantic everyone, but it's octane, not octain

[Shenley]

However, during the war..........

 

http://www.rsc.org/AboutUs/News/PressReleases/2009/SpitfireFuel.asp

 

To quote a famous brand "every little helps"

[KyleR]

^^ Thats American numbers which by default are lower than ours. I think they're 91 is similar to our super (about 98) so the 100 mentioned in that link would be like 110 octane, which is why there was such a difference in the plane.

 

 

 

As for using super, it's not all about an extra pony or two or extra MPG, it's about detonation of the fuel in the chamber at X temperature. Different levels of fuel detonate at different temperatures, our cars from the factory are mapped to detonate at whatever temperature 98 RON does, and therefore running lower levels (and possibly significantly higher) causes the air/fuel mixture to ignite at the wrong point in the revolution and can destroy the engine.

 

 

Thats how I read the situation anyway...