Have used the oil additive for some time. Although it primarily makes me feel better, it does appear to help with oil pressure, in that it comes up to pressure quickly, is maintained and does not fall off to the extend that it did when I ran oil alone (Rotella 30W) in the warm Florida summers.
Pricey, but I think it worth it. I also use the Lucas lube as well on all of the suspension, which was all recently rebuilt. Have not tried it in the transmission, though. Would be interested in any other information about it in that application.
