I am able to buy Sunoco racing fuel here in Baltimore that is 98 octane.
It has a special name that I forget and is unleaded. Costs about $3 a
gallon but really cured my "pinging" problems. I would check with any local
Sunoco stations to see if they carry it. Someone had posted a way to make
your own high octane but it seemed pretty complex and I did not save the
message someone else may have it. My understanding with the off the shelf
additives is that while it says it may boost 3 to 5 points that means a
percentage of a gain meaning it would take 10 to 20 bottles of the additive
to get a 3 to 5 real octane gain per tank of gas.
At 08:31 PM 3/12/98 -0500, Tony Rhodes wrote:
>
>I have a '67 TR4A. It is undergoing the final restorations prior to being
returned to the road
>after many years. I always had trouble with run-on in the past. I
remember this happening
>even when it was new! I cured it with 100 octane low lead specialty
fuel. That isn't really
>available to me anymore. The manual says 100 octane is to be used. Is
Sunoco 94 good
>enough? What else can I do?
>
>Some have said something about mixing Xylene or Toluene in some ratio
(maybe 1:5)
>to get something near 98 octane. Anyone with experience with this? Where
do you get such large quantities of this stuff? What about "104 Octane+"
and those over-the-counter additives? I think they may well be a bunch of
garbage.
>
>Anything else to cure the run-on?
>
>-Tony
>
>
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