The 1950's? People on this board make a big deal about the differences in oil formulation from year to year. Chemistry has come a long way in 5 decades and I see no reason why improvements can't be made.
Mola and others have stated that the new gear oils have the Sulfer and Phos "locked up" and are no longer a concern for corrosion. This is pretty much accepted as gospel. I'm not seeing why is it so hard to believe that the chlorine cannot also be "locked up" (i.e. no loose Cl floating around).
I have just started to use MT10, a chlorinated additive, so I have no results so far (soon to have a UOA) in my truck. I have, however, been using this companies' (Muscle Products Corp.) fully formulated stand alone products for more than a year and have yet to see a spec of rust on any of the applications (garage door/opener, door/hood hinges, latches, firearms, etc).
In fact, this product has a similar "micro-polishing" (asperity roll-out) effect as Royal Purple. The screw on the garage opener is now very shiny and operates MUCH smoother than when it had the original black goop that was on it.
They offer a Technical Article (PDF) that gives at least a basic idea of how it works.
Mola and others have stated that the new gear oils have the Sulfer and Phos "locked up" and are no longer a concern for corrosion. This is pretty much accepted as gospel. I'm not seeing why is it so hard to believe that the chlorine cannot also be "locked up" (i.e. no loose Cl floating around).
I have just started to use MT10, a chlorinated additive, so I have no results so far (soon to have a UOA) in my truck. I have, however, been using this companies' (Muscle Products Corp.) fully formulated stand alone products for more than a year and have yet to see a spec of rust on any of the applications (garage door/opener, door/hood hinges, latches, firearms, etc).
In fact, this product has a similar "micro-polishing" (asperity roll-out) effect as Royal Purple. The screw on the garage opener is now very shiny and operates MUCH smoother than when it had the original black goop that was on it.
They offer a Technical Article (PDF) that gives at least a basic idea of how it works.