This is just an observation from about the last 30 years or so .
Reading all of the articles in auto and bike magazines regarding comparison tests for after market fuel additives, and what ever is the newest hyped product of the time .
The usual conclusion, is that there is no real world data to back up claims of any better performance, or whatever positive benefit this product would have .
Most variations of the test results, were within the statistical error for such a test .
If there were any repeatable positive results, it usually was of such a small amount, that it wasn't worth the effort and expense .
Just the observation from another of life's slackers .