The slipery material in the electrical connectors is not oil. It is a silicon-based grease to protect the contact from corroding and helps to maintain optimum electrical continuity.
Yes.having low or no oil causes friction in the pistons which will cause car 2overheat.
an oil pan leak is adding oil to the already polluted environment, causes you to drive with your car a bit low on oil at times, and causes unsightly stains under the car .aside from all this if you monitor the oil level and keep it where it should be , not much of anything else ,i can think of,
The computer in your car just measures how much oil you have, it doesn't need to do anything else.
The engine is burning oil.
bad oil ring,time to freshen up the eng
This is often a cracked head gasket between oil passage and a cylinder.
your oil sending unit is bad
it could be anything, from the axles to an engine with a lack of oil.
It can causes serious damage
The engine of the car may need to be cleaned or your oil may need to be changed.
Gearbox oil needs changing.
Heat, lack of lubrication, or coolant in the cylinders or oil pan.