Interesting discussion. I bought a tube of RNT yesterday and will soon try it on a dual motor AF diesel with axles bushings, metal worms, and plastic/nylon drive gears. I've been using Lubriplate 630-AA for a long time with great success on my engines and those I repaired for customers. Prior to that I tried LaBelle 106 with Teflon, but found years later it had dried out , stiffened, and changed from slick and creamy to a more putty like consistency. I actually had to remove it on some and replace it with 630-AA. For oils, I prefer plastic compatible LaBelle 107 medium and 108 light. Great and lasting success with them.
PS Any chance RNT is the grease (#14-25 Special Racing Oil) that was sold years ago for use with Aurora HO slot cars? It came in a small glass jar like a Testor's paint jar with an applicator. When I opened up my tube of RNT yesterday and put some in a syringe, its consistency and mild odor reminded me of that. Talk about throwbacks.
