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I slapped $20 in (was on the red) from a Mobil servo down near cross roads that I have never used before.

The initial drive back home which is a couple of km's was ok the car felt normal responsive etc.

NOW..

The next time I took it out at first it was ok then I went to hit boost coming up flagstaff hill road and noticed that it felt very flat.. As if boost wasn't being made, I looked down at the boost guage and sure enough it was making plenty of boost near 15psi.

It feels like there is almost no difference between 5 and 15psi.

I then pulled over and checked out a few things but all seemed in order.

I then took off on standard boost (11psi) and what it feels like is it is really flat then all of a sudden on 11psi it sort of takes off but feels like it is hesitating slightly. I can't hear any pinging and timing is at standard.

help... :P

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https://www.sau.com.au/forums/topic/16864-eekkk-help-possible-bad-fuel/
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yeh id say fuel as well

my car ran in a similar way when i drove on the fuel which had been sitting in the tank for a month cos the car had been off the road. i also ran a bottle of injector cleaner through the next tank, may be coincedental but it made a fair bit of difference...

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