Late post, but after Jim's testing and more checking around, I started using 2 oz of lead to a gallon on 93 octane gas. I also put 1 gallon of toluene to 10 gallons of that. Now there is some snappy fuel that you can feel a difference in. And I can load up the trunk with bottles of the products and go anywhere I care to. More importantly, I can gas up and come home. After around 1300 miles of this I pulled the plugs and see nothing to raise suspicion.
