[AJD] Physics 101

[wb5cys]

What is the physics behind our old treasures being harder to start in cold 
weather?

Is the ignition system affected by the cold?
Is the fuel mixture somehow different?
Is it harder to burn the fuel mixture enclosed by cold iron?
The physical effects of the thickened oils are obvious, but are there other 
issues with oils as well?
What about air intake?  Any changes there?  Am I more likely to suck a glob 
of oil from the breather into the carb during cold weather?
Aside from the obvious effects from freezing, does the coolant system behave 
differently during cold weather?

My old John Deere tends to wake up pretty well on a cold morning, about as 
well as I do, but the definition of cold here in Texas is different than it 
is elsewhere.

Thanks!

Cal B.
Nacogdoches, Texas