Hi,
Have you tried resetting the ECU, it often improves consumption when you use to a better quality fuel - noticably.
Disconnect the battery for around 20 minutes to reset without any tech equipment.
Martin
> > I've got an IS200 auto, and have been using Shell Optimax for the last few
> > month's as it seemed to give better economy (about 1 mpg) than the
> > supermarket petrol.
> >
> > A couple of week's ago I experimented and filled up with BP Ultimate > petrol,
> > and am seeing another mpg or so improvement. Its difficult to give an > exact
> > comparison as my type of driving varies so much from week to week but > there
> > is definitely a noticeable improvement. (I can't honestly say that
> > performance has noticeably improved, so any change in this is subtle.) > >
> > Anyway, thought I'd post this and see if anyone else can replicate this. > Be
> > warned, the fuel is expensive (88p litre at motorway prices yesterday) and
> > BP stations are hard to find - but if these gains are repeatable its
> > probably worthwhile using it.
> >
> > Bob Huntley
> >
> >
>
> I have been using ultimate for a while, but economy seems identical. GS300,
> always just under 18 mpg. Short journeys climate control on auto. > > mrcheerful
>
>