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(Post Link) post #1 of 15 Old 27-08-14 Thread Starter
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Octane boosters...

Any one use them?

Im only thinking about it as I live in NI and the best fuel we have is 97 RON.

Fairly old but this might be interesting, this is the review of the products,

Octane Boosters | Fuel Tech Experts

After reading the "do you need octane booster" I would say I do.
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Does your engine ping, or retard the ignition?
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Nope. But the tmc box I use says I should be using 98 ron fuel, as does the fuel cap on my car, well 91-98. Im guessing the engine adjusts for this but to get the most out of the engine and prevent knocking would these octane boosters be worth it?
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Yes use it...proven many times over and over on a dyno it works.

On a tuned car I'd recommend running it all the time for 4 tanks...then just take it easy for 2 tanks and then switch it up again using it for 4 tanks etc.

This is what our local NF dealer suggests.
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Originally Posted by Guili View Post
Yes use it...proven many times over and over on a dyno it works.

On a tuned car I'd recommend running it all the time for 4 tanks...then just take it easy for 2 tanks and then switch it up again using it for 4 tanks etc.

This is what our local NF dealer suggests.
So do you mean use it for 4 tanks, then dont use it for 2 tanks, then repeat? Or do you mean after using it for 4 tanks, use it but drive slow for 2 tanks?

Thanks for the reply mate, I have ordered this,

http://cgi.ebay.co.uk/ws/eBayISAPI.d...E:L:OU:GB:1120
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Imho the boosters are only useful if engine can adopt (advance timing). Otherwise its just waste of money.
I didn't feel (I know, not much scientific, but will try to log spark advance next time) any peformance gain with 98 RON on my GTV 3.0V6 24v.

Last edited by yan.ko; 27-08-14 at 16:39.
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(Post Link) post #7 of 15 Old 01-09-14 Thread Starter
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I know the ecu in mine can. It can change timing for 911-98 ron fuel. In NI we only have 97. The tmc box I use times for 98+.

Im now running the tmc box on level 8 of 9 with the octane booster and its still very smooth, although pulls harder. When i had first tried the box at level 8 it wasnt smooth at all.

I definatly think the boosters have worked well.
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The N55 has a Knock sensor, so it will pick up the extra octane fuel.....
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Presence of knock sensor does not guarantee the engine can adapt for higher octane fuel.
Busso has it either (two actually). But they are there just to retard ignition (to save engine).
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Power Enhancer HOME | Engine Cleaning | Injector Cleaner | Octane Booster
this site might be of some use. found it browsing on bobistheoilguy
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Okay, here it is ...
(fourth gear, full throttle)

95RON
95RON.jpg

98RON
98RON.jpg

It looks like the knock sensor kicks in few times. So the combustion happens more cultivated with 98RON fuel, but overall feel is somewhat ... that the car is little bit lazier. Maybe it's just a matter of sound (which is not so rough), maybe it has something to do with the fact, that higher octane fuels burns slower (and thus the peak cylinder pressure is developed later).

Last edited by yan.ko; 10-09-14 at 11:11.
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I use toulene with added 2T at 10% of tank volume every 4 to 5 tanks of standard 98 RON.


It cuts down on a lot of excess engine vibrations and adds torque to the applied power.
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Sorry for late reply Towney...yes...4 tanks in, 2 tanks out and repeat cycle that how i use it. I'm traveling this weekend so I put in 5Ron with full tank this morning again.
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Thanks for all the replies guys. Now im in about 4 tanks it definatly feels smoother.
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i used to use millers octain booster in my integrale,

at first you dont seem to feel the difference but if you fill up without using it it feels like your driving with the hand break on
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