For most of us the main reason we resort to booster is convenience and availability, I think that's the reason for this thread.
Nobody is going to argue that race gas is better safety wise as well as performance wise but when nothing else is available, well booster will just have to do.

 

Outlaw octane booster
Sports compact car did a test on it. They took it to a lab for their test. It raised our California crappy 91 octane gas to a crappy 92 octane gas. (Man how come we do not get 93 octane Race gas is a better choice but it would cost me more to drive out of the way for those 2 gallons of 100 octane. I also do not feel like caring around 2 gallons of fuel in my trunk.

 

when i was in tucson az, 91octane = ~$3.40/gal. Now here in austin tx, 93 octane = $2.90/gal

 

Here in Italy we now have the new Shell V-power 100 RON... 95 r+m/2... and it's the one I use in my car...

BUT it is at 1.50 euros per liter...

that is to say 7.08 $ for 1 us gallon...........

 

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Man...just pay the tariff and run that 95 (R+M/2) octane, Shell-V stuff in your new Evo. The better octane boosters aren't cheap and if you read the small print where they say that it raises your base fuel's octane by 7 points....they mean 0.7 of an octane number not 7.0 numbers...so they only raise the octane level one number at best.

If you are not willing to pay the price for the 100 RON octane stuff then you might try blending it with the cheaper 95 RON stuff. But hey, high performance turbocharged cars require the best fuel available. In the long run it is cheap insurance and detonation is your enemy. If you plan on tuning your car to the edge and running 25-27# of boost, then run the best available fuel.

 

I understand the reason for the question, because hey, who doesn't want high octane tankfulls of gasoline by mixing in a small bottle of snake oil. Too bad those bottles are filled with stuff that will at best not even raise the mix one full octane rating number, and may do damange to your engine in the process...

 

Yes, obviously I use always the 100 RON fuel,
but I'd like to have some options to use when dynoing and in track days to increase safely a bit the boost....

 

Snow Performance And Blue100

 

Can you get Shell Optimax+CVLTurbo gasoline at the pump? It has a RON of 101.4 and a MON of 89.9, with that stuff you shouldn't need anymore octane(95.6 R+M/2).

If however,you are set on using an off-the-shelf octane enhancer, then I would recommend Millers CVL, produced by Millers Oils in Britain. This stuff will raise the octane level of a tank of gas by three whole octane numbers(30 points).

What I used to do when I would go to the track was carry two gallons of Xylene in the trunk, pull over a 1/2 mile from the track entrance and dump the 2 gal of Xylene into my car's 1/2 full gas tank.

The petroleum companies used to rely on tetraethyl lead to raise the octane of gasoline, whereas now they use a combination of MTBE, MMT, Toluene and Xylene.

In your case, I guess you are just being extra safe....which is understandable. Personally, if I had a IX I would feel safe running it at 25 to 26# of boost on that 100 RON Shell gasoline.

The IX's, because of improved design of the coolant passages in the cylinder head and the upgraded turbo's more efficient, colder-blowing compressor housing are much less detonation prone than the earlier generations of Evolutions.

 

Water injection: Its just easier and cheaper in the long run...I personally dont beleive that octane booster is any real help. for the money Just do water/meth injection Its more efficient.