Actually, the A-5 friction ring set-up is designed to run almost free of lube. If one feels the need to put a wipe of oil on the magazine tube, make sure to use nothing thicker than kerosene to keep the bugger clean and provide the proper amount of stiction for the friction sleeve. You also need to place the friction set ring in the proper position to allow for more or less grab on the friction sleeve for either light or heavy loads.
The newer inertia type models are quite different in design and operation.![]()
Make sure the rings are arranged the proper way for the loads your shooting. Some have the diagram on the forend. I use just enough hoppes 9 on the tube to say I did, and it works great.
The Remington Model 11(A-5 copy) I owned had the diagram in the forend. Hoppes 9 is perfect for the mag tube as is Jet Lube 12/34. I've seen numerous articles in old gun books that mention running the A-5 with dang near no lube on the mag tube, except for the light coat of Hoppes 9, kerosene or lamp oil. Never did see one that recommended motor oil.
I've owned a pile of A-5's and the like and never had an issue with the "dang near dry" method of lube.