Is this easily possible without messing up the mixture and how many bottles would I have to use for a full tank?

Cheers,
Ant

 

You can use Optimax which is 98.6RON and OB and that should take you to 100RON.

If you use Millers it works better without cats apparantly.

 

I think with 50 mls of NF black bottle you get 1 ish RON, so I think a whole bottle would be needed going from 95 to 100 RON (250mls per bottle). Prob 1/2 bottle for taking super (97RON) or optimax (98RON) to 100 RON is the recommendation I think. For track days tho just stick a load in as this will reduce temps and should give you smooth-running.

My 95WRX seems to run ok with just optimax though. Having said that it was smoother, and probably a little bit more responsive, when I used 50 mls with optimax - sounded really sweet with that stuff in.

hope this helps,
cheers
Spence

 

Cheers guys.

Only super unleaded stations are pretty far from me, so just wanted to know it can be done.