I don't know the background on it ie if it's been mapped for vpower ect, I don't fill tanks I just put in what I need

You're meant to run it on high octane fuels like the Vpower it's better for the car really but the ECU will learn that you are putting in lower octane fuel :)

If you check the handbook for a Subaru it states only use 97 RON + as the ECU struggles to cope with normal unleaded and can cause nasty repair bills.

I know a couple of Subaru drivers that only run it on 95 they haven't had a problem. But there cars feel really flat and take an age to boost or feels like it maybe it's me. But high octane is all I will use anyway :) 

If you check the handbook for a Subaru it states only use 97 RON

I would if I had one.....doesn't matter now, I've got more serious !Removed! to deal with....see other post......car may well get scraped out sold for spares THIS time....see what happens

running on Vpower will return larger mpg as well as good response - worth the extra money

That's what I've been using mind you, I just if I'd get away with u/l.

.as v's 10p a ltr dearer, robbing fkrs!!

Its a trade off - more money spent initially but travel further with a smoother more responsive engine