fergyflyer

Octane boosters are a waste of money. Look for a good fuel injector cleaner like Lucas, Sea Foam or not the injector cleaner, but pure Techron.

If you read the print on the bottles they say they raise octane 1-3 points. Well the way octane is calculated, if you put 87 octane in your car and put a bottle that raised it 3 points in, you'd now have 87.3. To get to 91 which is the minimum you should run in the GTO, you would need 13 bottles. Not ver y cost effective.

An octane booster that does work is toluene. When added to gas it makes benzene which increases the power potential and the octane of gas. The problem is if you don't mix it exactly right you can really screw things up in the fuel system.

Another downside to Toluene is that it attacks the nervous system and can cause cancer from breathing the fumes of it. It is still toxic after it has been burned making your car a very dangerous polluter if you add toluene.

Here's a good link.Toluene - Octane Booster FAQ