[TowerTalk] US Tower gearbox

[Mike Fahmie]

Again...From Mobil's website;
       While Mobil SHC 600 Series are generally compatible with mineral oil based products, a mixture may detract from their performance. Consequently it is recommended that before       changing a system to one of Mobil SHC 600 Series products, it should be thoroughly cleaned out and flushed to achieve the maximum performance benefits.-Mike-So, you won't blow up, gum up, or screw up your gearbox by mixing the dino-oil with the synthetic.  It's just that the more dino-oil that's left, the less it acts like synthetic oil.
-Mike-

 
      From: Bob K6UJ <k6uj at pacbell.net>
.....You want to purge as much as you can of the old gear lube. The synthetic lube is not compatible with the original gear lube.
.....
Bob
K6UJ