I am not sure if this belongs in this forum or the UOA forum so I apologize if this is the wrong place. I was just curious if anyone is planning on doing a UOA with one of these oils. I checked and did not find any unfortunately, but I just wanted to determince which oil is better as far as additive package and viscosity stability is concerned. I checked the specs for both, and are quite similair to eachother. Pour points are the same for both the 5w and 10w weights with the only difference being the viscocity index for Pennz HM is slightly lower.