Hi

I've got a Nov 03 STI (Type UK) and live in Ireland, where unfortunately they have recently taken super unleaded petrol off the market. So, I've had to run my car on 95 octane unleaded with octane booster.

Now, the octane booster I got, well I don't know if its the best. Can anyone recommend an octane booster that will give me the desired performance that super unleaded would? I don't want to harm the car in any way, but I notice a fair difference in performance with ordinary 95 unleaded.

Does most octane booster really do the trick? Do they bring 95 unleaded up to around 98?

Basically, whats the best for my Scooby and where can I get it - would prefer to buy in bulk.

Ronan
Ireland

 

I use millers octane plus on my MY03 JDM STi and she runs great
NF is suppose to be the best but millers does the job for me, you can get it at www.jap-innovations.co.uk

Tony

 

NF Race, best in the world

 

Millers ~£40 x10 delivered.

http://www.scottsautomotive.co.uk/Scripts/default.asp

Works a treat for me and no messing about measuring 10ml at the pump, just dump a bottle in and fill her up..!

 

Thanks guys.

Is there any harm in running the car on 2 much octane? I just checked out that NF ones and it would seem that you can go above 100 RON with it?

Cheers!
Ro

 

You may find that you need to change the lamdba sensor more frequently, but other than that you should be ok.

You will know when you are using too much as the inside of your tail pipe will go orange

NF for me

Dave.

 

Thanks mate! Have no clue what a lamdba sensor is but it does not sound too serious!

 

millers CVL turbo... The rest are basically just 90% paint stripper!!!

correct me if im wrong guys!

 

OK your wrong most of the good Subaru tuners use NF. My car didn't like Millers, still got Knocklink activity. Used NF and only got the first green at red line.

The lambda sensor is in the exhaust somewhere (not sure on the newage cars), I think it monitors the air/fuel ratio. You will know when it dies as your fuel consumption will go through the roof. Costs about £100 for a new one and they are eay to fit yourself.

Dave.

 

Wouldn't fancy putting Nitromors in my tank

 

Seems steep if that's the +2octane stuff. I paid about £30 for 10 bottles (Camskills I think), and I've seen it cheaper at shows