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[frostbite]

I think we should try and make 5 star 101ron, without the lead

[johnnydog]

I'd have 100 octane (or RON - marginal difference, I know, before anyone comments...) or 5 star WITH lead any day, so then my old Triumphs would be very happy!  They don't like this unleaded crap with all the ethernal content in it......

[Diamond Black Geezer]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Not all super unleaded are the same. Some are 97, others are 98, and just a few are 99, however they are all pretty much the same price. I am certain that 99 Super (Tesco Momentum, Shell Vpower) are better. Better response and better MPG providing you do not let you right foot take too much advantage of the improved response  Some "Supers"  are a waste of money. So, less than 98, don't buy it, fill up with standard unleaded.

never actually realised that there were differences in even superunleadeds. Nice bit of info, ta.  As above, I use Tesco, found to perform the same as the VPower, but a few magic pennies cheaper per litre. 

[baggers]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Should do thats what it's set up for, but use the 99 rating.
I get better performance and return.  But if your looking for a return then you need to drive with that in mind.

[zirk]

My old Re Top Cosworth used to quite like AVGAS. 

[atann]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Should do thats what it's set up for, but use the 99 rating.
I get better performance and return.  But if your looking for a return then you need to drive with that in mind.

I do drive very conservatively, I will it a give it a go. Cheers

[GastronomicKleptomaniac]

One of ours gets a bit lumpy if he doesn't get a tank of super every so often. But that's probably because he's done moon miles and the cats are a little... tired...

[atann]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Should do thats what it's set up for, but use the 99 rating.
I get better performance and return.  But if your looking for a return then you need to drive with that in mind.

Only have Asda, Morrisons and Essco where I live. They are all 97ron I believe. Is it even worth using 97ron?

[Mister Rog]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Should do thats what it's set up for, but use the 99 rating.
I get better performance and return.  But if your looking for a return then you need to drive with that in mind.

Only have Asda, Morrisons and Essco where I live. They are all 97ron I believe. Is it even worth using 97ron?

It's probably still about 6p per litre more expensive than the standard 95. There will be a small difference, but hardly noticeable and very unlikely to be worth the extra cost. So, in a word . . . . no

[atann]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Should do thats what it's set up for, but use the 99 rating.
I get better performance and return.  But if your looking for a return then you need to drive with that in mind.

Only have Asda, Morrisons and Essco where I live. They are all 97ron I believe. Is it even worth using 97ron?

It's probably still about 6p per litre more expensive than the standard 95. There will be a small difference, but hardly noticeable and very unlikely to be worth the extra cost. So, in a word . . . . no

I'm meant between 97ron and 99ron?

[Mr Gav]

I only put SU in the Omega a couple of times  when I had it, not worth the extra as there wasn`t any noticeable difference whereas the Zed gets Shell V power every time as it needs 97 ron.

[baggers]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Should do thats what it's set up for, but use the 99 rating.
I get better performance and return.  But if your looking for a return then you need to drive with that in mind.

Only have Asda, Morrisons and Essco where I live. They are all 97ron I believe. Is it even worth using 97ron?

I don't bother with the 97, it's 99 or stick with the 95 until you find some.

[baggers]

I was on the A46 near Evesham over the weekend and standard unleaded at Texaco was £1.14/ltr    it was quite low so just put £10 in continued up to Tesco at Banbury and filled up with 99 at £1.13/ltr

[Mister Rog]

Averaging about 24mpg around town, with aircon on. Would a change to super unleaded increase the response from the engine and mpg?

Should do thats what it's set up for, but use the 99 rating.
I get better performance and return.  But if your looking for a return then you need to drive with that in mind.

Only have Asda, Morrisons and Essco where I live. They are all 97ron I believe. Is it even worth using 97ron?

I don't bother with the 97, it's 99 or stick with the 95 until you find some.

Same here  99 or standard 95, no 97 or 98

[Shackeng]

My old Re Top Cosworth used to quite like AVGAS. 

My Mk1 Consul ran well on 115/145, but I did add some hydraulic fluid to ease the pain.