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[atann]

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

[Nick W]

No.

[zirk]

Probably improve more if you turn the Air Con off, rather than using SU.

[Shackeng]

I would hesitate to disagree with Nick, but while I cannot speak as to mpg, my 3.2 seems to like Shell super as opposed to supermarket super, and definitely feels more spritely.

[atann]

I would hesitate to disagree with Nick, but while I cannot speak as to mpg, my 3.2 seems to like Shell super as opposed to supermarket super, and definitely feels more spritely.

I might give it a go, nothing to lose. Essco super?

[Mr.OmegaMan]

I would hesitate to disagree with Nick, but while I cannot speak as to mpg, my 3.2 seems to like Shell super as opposed to supermarket super, and definitely feels more spritely.

+1

MPG average around 25mpg recently, Can't say if that's more or less MPG than you'd get with regular fuel as I've been using Shell for a few years now. But I'd say it runs better overall on Shell V-Power / Nitro or whatever their calling it these days.

[zirk]

I would hesitate to disagree with Nick, but while I cannot speak as to mpg, my 3.2 seems to like Shell super as opposed to supermarket super, and definitely feels more spritely.

I might give it a go, nothing to lose. Essco super?

Certainly wont do any harm, I occasionally put Shell SU in if theres a promotion going on with the Shell Drivers Club Card thingy, sometimes the extra points equals out the extra costs.

Cant honestly say it mase much difference in MPG on any of the Omegas, the little 1.6 Tigra likes it, some Shell SU in that can achieve the magic 50 MPG on a run.

[atann]

I would hesitate to disagree with Nick, but while I cannot speak as to mpg, my 3.2 seems to like Shell super as opposed to supermarket super, and definitely feels more spritely.

I might give it a go, nothing to lose. Essco super?

Certainly wont do any harm, I occasionally put Shell SU in if theres a promotion going on with the Shell Drivers Club Card thingy, sometimes the extra points equals out the extra costs.

 

Cant honestly say it mase much difference in MPG on any of the Omegas, the little 1.6 Tigra likes it, some Shell SU in that can achieve the magic 50 MPG on a run.

[Diamond Black Geezer]

Tesco Ultimatum, or whatever it's called, over the 'brand name' superunleadeds 

I wouldnt be able to justify the extra cost of the BP/Shell stuff, but the Tesco version has come out the same/even a fraction better in tests. I've used it for about a year now. Also a bit cleaner, and you know you're doing good in your engine with every fillup.

[tigers_gonads]

Its mostly a placebo affect imo.

Yes the extra detergents will clean out the injector system so it will run better but once clean, that's it 
As for the higher octane, again, yes it will feel more responsive at first but that will soon be curtailed by the ecu via the knock sensor  

Now if you could have a remap to take advantage of the higher octane then happy days 

Super max type fuel is of greater benefit to tuned forced induction engines were the compression ratio is much higher because it helps stop pre ignition of the fuel mixture 

[Diamond Black Geezer]

I know yonks ago there was a recommended V6 ecu remap people, 'the' one to get. Cant remember the name now.

[biggriffin]

In a 3.2 running std cats (pre's) then shell nitro, every other month(tank full) can help keep the codes away, but I've never really noticed much difference between the posh fuel and std fuel., well not in an omega.

[omega2018]

differing opinions here, do a search... 

easy to test if you do the same stretch of motorway each day and can set and keep a cruise speed.  when i did this with a 2.5 v6 i got about 10% more mpg.  saving on a 2.6 will be less due to the lower compression.

still worth it i think as super is never 10% more than normal and you do get better performance as well as mpg.  that s just my experience though, i'm sure others will be along to tell you god is on their side

[biggriffin]

differing opinions here, do a search... 

easy to test if you do the same stretch of motorway each day and can set and keep a cruise speed.  when i did this with a 2.5 v6 i got about 10% more mpg.  saving on a 2.6 will be less due to the lower compression.

still worth it i think as super is never 10% more than normal and you do get better performance as well as mpg.  that s just my experience though, i'm sure others will be along to tell you GOD is on their side

He use to live in reading, not near slough, But oof doesn't do religious twoodle.

[Mister Rog]

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.