GR86 Engine clean pickup

[Ha1ey]

Hi guys, my 500 mile car seems to hesitate slightly from idle before raising the revs when you start to press the throttle. Almost like a misfire, the revs drop about 100-200 rpm before lifting. Only noticed from Idle, anyone else seen this?

 

[Silver Fox]

Not had anything like that at all @Ha1ey (I'm on almost 800 miles so far).

The first thing that popped into my head was - what fuel are you using?

 

[Ha1ey]

Not had anything like that at all @Ha1ey (I'm on almost 800 miles so far).

The first thing that popped into my head was - what fuel are you using?

Yes, did cross my mind. My last fill was not at my normal garage but service station on M25, 99.9% I picked the high octane but maybe not. I will fill on something decent and see if it improves.