A guy sent my buddy some additive stuff....purple in color and he didnt say what it was. Told him to get it running then drop a few drops down the carb and run it....he also recommended an old glow plug to do it with. Well it seemed to work, as we got a couple more mph out of the motor (radar checked) and had no ill effects down the line. I do not think he recommended to use it every run, just to "coat" it initially and then do it every so often.

We ran a few big races after that and it never bothered the motor or any of the next glow plugs we used. And yes, we tried it on an R&B C5 buggy motor....pretty dang expensive.