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Discussion Starter #1
In the market for a Volvo R manual. Ran across this link while doing some research.

http://volvospeed.com/Reviews/octane_boosters.html

Interesting because I though that most of these additives were a crock. Apparently not.

Keep in mind that a NA Elise will not see any benefit as long as you're sure your premium is at least 91. If you're in an area of the country where 90 is the max, or if you're worried that the 91 is not really 91, then some of these may be useful.

Of course the Turbo'd/Supercharged guys can always use the higher octane if they have the car set up appropriately.

I keep a bottle in the trunk for any tanks of bad gas I may get.
 

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why not just go all out with race fuel (100-110 octane?). I don't know about here in the Pac Northwest, but back in North Carolina there were dozens of stations that sold it at the pump
 

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you lost me at.. some of these additives aren't crap. lol
 

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Discussion Starter #6
why not just go all out with race fuel (100-110 octane?). I don't know about here in the Pac Northwest, but back in North Carolina there were dozens of stations that sold it at the pump
I have never seen anything over 92 here in the midwest. Almost all stations max out at 91, maybe 5% max out at 90, and maybe 1% carry 92.

I do find it odd that different regions get different octanes.
 

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Discussion Starter #8
You might want to check out this Fifth Gear video regarding fuel additives before you believe the snake oil advertising copy.
http://fifthgear.five.tv/jsp/5gmain.jsp?lnk=901&id=190
Nice testing.

Like I said in my post - not going to do anything for a NA Elise that gets 91 regularly.

But they might be useful for folks who can't get 91 or are running setups (turbo/SC) that can utilize the additional octane.

The Elise was designed for 91 and anything below that will cause the ECU to retard timing, etc to adjust for the lower octane. This makes insuring you've got at least 91 in there a good idea. If you live in an area where you're not always getting 91, these additives should help.
 

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NY has 93
 

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You might want to check out this Fifth Gear video regarding fuel additives before you believe the snake oil advertising copy.
http://fifthgear.five.tv/jsp/5gmain.jsp?lnk=901&id=190
While the additives don't improve performance of gas appropriate for the compression of the engine, they octane boosters likely do increase octane rating (which I think is what the poster was discussing). Their uniform 2% performance decrease by excessively boosting the octane was interesting, though...
 
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