thin oils for lubrication
 

is there a difference in using either bearing oil, cv joint oil or 3in1? can they be interchangeably used for the same things like for bearing lube, after run engine lube, axle/joint lube, etc.
they are all very thin oils. are they of similar makeup?

Of course everyone has their own idea. I have the motto that everything that lubes will work.

there's lots of different types of lubricant bases. i wouldn't put any of them in my nitro engine as after run oil tho

okaaaaaaaay why not?

Because most oils and greases do not mix with methanol and will create a mess inside the engine.

engines are too delicate to experiment with that kind of thing so i usually just get the recommended after run oil

That's what she said.

are solvents bad for rubber or silicone orings? like electronic cleaner, brakleen, motor sprays, denatured alcohol?
or should they always be removed before cleaning an engine, carb or diff?

..

following

After Run Oil
 

would you say 3n1 or Marvel Mystery Oil is ok?

Marvel mystery oil is well used and save to use but a simple test shows it does not mix that well with methanol.

I'm sure that all those will work more or less the same. Maybe if you were an absolute professional then there might be a few subtle differences between those types of oils and their uses.

In theory, bearings should use a low viscosity oil. Faster speeds = lower viscosity oil. CVs should use an oil (or grease) with some anti-wear additive as there is lots of sliding metal to metal contact. Viscosity would be higher than bearings as the motion is slower and loads are higher. In practice a good quality general lube will work for both.

Cylinder oils are more critical. They need to be just soluble enough to blend with fuel and insoluble enough to remain behind on the cylinder when the fuel is vaporized.