Octane Booster

timos

New member
ISDC Club Member
Hi Lads
Any recommendations on with octane booster is best suited for 2.5 sti?
 
NF race booster would be the best option. Can get pricey if using it with every tank
 
NF is best
or just get it mapped for Irish fuel and you won't need booster. You'll make slightly less power but won't have to worry about mixing.

I have mine mapped on half a bottle of NF because I'm driving it every day and like Eoin said, it can get expensive. it's about €20 a bottle
 
Fortunate to have access to Supreme Petrol—(E5)97Ron. Car runs really well on it, tank lasts much longer.
 
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Fortune to have access to Supreme Petrol—(E5)97Ron. Car runs really well on it, tank lasts much longer.
97 Ron would be savage. It's "95" down south,, but probably closer to 92 according to some mappers
 
97 Ron would be savage. It's "95" down south,, but probably closer to 92 according to some mappers
Some Applegreen stations have good Super Unleaded petrol. Occasionally you’ll see E5 marked on the handles, even though the pump body says E10.

Where the fuel tanker connects to the fill pipes for refuelling, there’s a dedicated premium pipe. When I’m refuelling in the south I’ll use that, along with half a bottle of NF octane booster.
 

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How are lads getting on running octane booster long term? Any issues with build of residue on injectors or spark plugs?
 
How are lads getting on running octane booster long term? Any issues with build of residue on injectors or spark plugs?
I daily mine for the last 2 years, I've put about 20k miles while running half a tank of booster.

Spark plugs need to be changed more often, for sure. Everything inside the engine, turbo and exhaust will turn orange from using it. Same as usual black soot except it's orange.

No problems for me so far
 
Some Applegreen stations have good Super Unleaded petrol. Occasionally you’ll see E5 marked on the handles, even though the pump body says E10.

Where the fuel tanker connects to the fill pipes for refuelling, there’s a dedicated premium pipe. When I’m refuelling in the south I’ll use that, along with half a bottle of NF octane booster.

It’s still 95 octane though that’s the thing

Is the booster worth the 10-20hp to you ?
 
Definitely not good for spark plugs.
Even with few Km’s and less than 4 months.
 

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I mainly run Supreme E5 (97 RON) without any booster.


I notice a difference, better mileage per tank and noticeably stronger performance with Supreme.


Cars built before 2011 were designed around E5, and it’s simply better petrol for performance in most moderate and older cars.


If I didn’t have access to Supreme, I’d still try to match the original RON the car was engineered for.


That said, if you’re a daily driver I can understand why you’d tune for 95 RON.
 
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