Superunleaded or not?

[videodoctor]

Does anyone recommend using superunleaded instead of ordinary unleaded.Is it any better,or is it just a waste of extra money.Has anyone had any experience of negative things happening when using super or are peoples experiences more positive.What do you guys think?

[Duncan]

Not if your car is in normal tune. If it's been remapped (or highly tuned) then SUL will be advantageous - as long as the remap/tune has altered the timing to take advantage of a higher octane fuel.

If you're running one of the engines in a Vectra/Signum in normal tune, then I wouldn't think you're really going to notice any difference with SUL. I remember using SUL in my 2.0T before the remap and I can't say I noticed much difference.

D

[soulman]

As Duncan says.......ive the bsr remap and use sul.....there again i did use it b4 and found it actually increased the fuel economy.As ive changed jobs now and have a loverly speedy trip to work,i,m getting 37 mpg in my 2.0t now

[Bainie]

I used it in my old 2.2 SRi and found it made a difference, defo made it a smoother drive and a little more frisky . The vxr runs like a bag of spanners without it !

[VXR_DV]

Ditto.

I was forced to use normal unleaded due to having only 20miles range left, and the filling station in the village only sold the the ordinary stuff.

It didn't like it: economy went down for a few tankfuls, and it wasn't as frisky either.

I'd expect the 2.0T to be very similar.

dv.

[VauxVeteran]

I trialled it in my V6 Omega, found it to be no different to normal other than an extra 25p a gallon.