opinions on fuel type
 

Unfortunately in my area they stopped with 98... So I'm left with 95, esso's 97, and BP's Ultima, which is 98 - and my sti rattles like sh#te with it.

Really a pisser as only in February I had a remap by JGM for 98.

So what would you recommend I should do ?
1. Remap to 95
2. Use octane booster with esso 97
3. use ultima 98, and turn up the music :confused:

help is appreciated. I'm inclined on octane booster solution, but not sure if they don't do any damage to the cat or smth...

Get it remapped for 97.

What 98 were you using before as V-Power is 99.

Do you have access to Tesco 99?

no access to any 99+
Before I used Total excellium 98

I'd get it remapped, you'll lose a bit of power but will same time and effort in the long run!

I would stick in the BP Fuel and get it remapped for that, at least you will get similar power although you are already running it on 98 RON so maybe the BP fuel you put in when the car ran bad was just a bad batch.

The other thing I would say is try and use a garage that is always busy so that the fuel is getting replaced frequently as fuel that sits in the tanks for a while will loose it's RON level over time.

well, just filled up with ultima, 40 liters, I'll see how it sounds later the week.
Was looking into buying nf booster, which seems to be praised, it is just a hassle to go every time tanking with a bottle after you