Strjock81:
I admire your skepticism. We need more of it, and not just when it comes to oil!
There is a way to determine whether a claim is valid or not. Systematically gathering data and analysing it should be sufficient when it comes to simple things, such as whether A-RX does what it says it does, and that approach is a much better way to evaluate a claim than the writing ability of the claimant, other unrelated claims made by the claimant, etc. Fortunately there have been many posts here where people have done just that with regard to A-RX, and in many cases they have carefully documented results that seem quite impressive. That and a good bit of curiosity is what motivated me to do my own little bit of systematic A-RX evaluation, which you can see right now elsewhere in this section. I still don't know how it'll turn out, but it is certainly at least possible that A-RX is what it is claimed to be: not a miracle product but an effective method of making/keeping an engine internally clean.
I'd extend that thinking to MMO and other additives, as well. I'm convinced a group of people like BITOG is a good way to concentrate a large number of observations in one place and, if you have a good working **-meter, reach good valid conclusions. This is actually a pretty good group of real, living people, and pretty light on the teenage geeks as far as I can tell.
- Glenn