using super unleaded instead of normal wont make it worse, it’s more the other way round , i heard all subaru turbos should be run on sul any way ? , i’m thinking not running on sul all the time maybe your issue , any chance of hearing the noise and where it’s coning from , mileage of car plus service history and has it been mapped ?

Micheal any update on your knocking noise ?

That’s what’s worrying me the type of fuel used , is it supposed to be SUL and not regular UL ?

I personally feel running it on standard unleaded has killed it and it’s given up the ghost , im sure they are supposed to be SUL even the WRX

The oil he’s using is not a great idea but the fuel is likely to be the culprit , ive always used SUL in all my cars wrx or sti , even a mapped n/a holden says use SUL , runs better plus better fuel economy and my understanding was that was the correct fuel any way

sorry my error misunderstood that , not the first post of ...i am using normal unleaded and it’s now not working , fingers crossed for him or it’s a big build on the way