I've worked on cars, motorcycles, and bicycles for good part of the past 25 yrs, besides being a degreed and practicing ME. Anti-seize is far and above the preferred thread protectant, for many reasons:

1. Proper torque & preload tension
2. High temp seize-up prevention
3. Galvanice reaction prevention (dissimilar metals)
4. Oxidation/corrosion prevention
5. Thread lubrication (for difficult to turn bolts)
6. Thread sealant (water ingress protection only)

Only anti-seize can do all this.

Grease makes an adequate substitute in some applications. I would never use motor oil. I've been around some master auto mechanics that would make me eat a grease burger (um, that's automotive grease) if I assemble torque sensitive parts (wheel lugnuts, cyl hd bolts, etc.) with motor oil on the threads.

Here's the reason:

Upon initial assembly, the long chain molecules (mineral oil, olefins, or synthetic ester-based polymers) in the trapped oil will resist the shearing force acted upon by of the counter-rotating thread contact surfaces. This is essentially dynamic thin-film lubrication - precisely what motor oils are designed for.

Problem #1: Motor oil is so excellent at thin film lubrication that the fastener will be over torqued.

Problem #2 Once the applied torque stops, what was dynamic is now static. The motor oil will eventually thin out between the contact surfaces completely over time. Heat, if present, will accelerate this process. Because motor oil has virtually no solids content, metal to metal contact will eventually result. This leads to two negative consequence:

a. Galvanic reaction may occur.
b. The now "dry" threads, being originally over-torqued, will now take much more force to "break" loose.

Bike fasteners are typically light-duty, small size, and low-torque. And usually not subject to high temp, so you might get away with oiling the threads. I personally would not allow anyone I have influence over to use it.

Sorry for the long diatribe. Just trying to clear some misconceptions.