doc, have been using the almasol 607 sae 90 gear oil in my 1998 26 sonic with 502 mpi for 3 yrs . had to replace lower bravo 1 case 2 weeks ago due to corrosion . when mechanic took apart drive could'nt believe that there was no wear at all on gears and bearings were perfectly clean !! now every one else around is asking me about it. i highly recommend it.