While the lubrication chart shown in the Service Manual, Sec 2-10, Fig 2-4 indicate that Mil specs given are not mandatory... the "oil can" lubricant recommended meets Mil 7870 gen purpose oil. Mil 7870 includes additives for anti-oxidant and anti-corrosion which are not included in the most common lubricant most owners/A&Ps use... LPS-1 or LPS-2. Although LPS-1 is a very (extremely) light aerosol oil... it does not meet Mil 7870, and makes no claims as to anti-corrosion.
There is a product which does. It is Aeroshell 3, available from Aircraft Spruce. I have a 1-qt ca (Royco brand) that has lasted me almost 15 years but now I'm down to my last few ounces. Spruce only sells it in 1-gal cans, for $36. Adding the freight makes it ridiculous..more than $50.
Sure wish Aviation Oil carried it.
![Sad :(](./images/smilies/icon_sad.gif)
(In a curiously related matter... the stuff is also specified for certain first-generation jet engines such as Turbomeca, Artouste, Turmo, Bastan and Marbore engines. If anyone knows someone running one of those.... perhaps you might inquire about obtaining a quart from their 55-gal drum?)