I'm very familiar with B.I.T.O.G., a tier lll "back shelf" oil enthusiasts forum. but I couldn't find any information there to back up your "seal sweller" claim. I also did a cursory glance at SAE International (yes, I'm a past member) and found a white paper,
Lubricant Formulation Effects on Oil Seal Degradation , that pretty much explains why seals fail. You can read it if you want - $25.00. Tell me what you think. Also, tell me more about "seal swellers". I would deem your posts even more credible if you quoted or referenced something from
The Official STLE Web Site | Society of Tribologists and Lubrication Engineers or
SciTech Connect: .
Let's try to keep snake oil stories and old wives tales to a minimum - if at all.