Originally posted by SVTGT350:
If you run 100 octane you will more than likely begin to melt your cats because it has a higher lead content than 91 octane. If you absolutely have to run higher than 91 you can mix in 100 up to about .25 tank. With the mix you should average out with about 94-95 octane.


Wheeeeeeeew...

If you have ever read the fuel pump it clearly states "unleaded fuel"

Unleaded fuel has been a requirement since 1976.


You should NEVER run leaded fuel in any modern car. If will destroy the O2's and converters and gum up the injectors.

Also cylinder heads have hardened seats now day so the lubrication from the lead is not required.

2000 SVT #674 13.47 @ 102 - All Motor! It was not broke; Yet I fixed it anyway.