The internet gives lots of contradicting advise about greasing or not greasing car battery posts to prevent corrosion. So rather than rely on the internet, I want to perform an experiment so that I can prove to myself that grease is good (or bad).
I want to measure the difference in current/voltage/power when I start the car with clean vs greased posts, (high current).
I also want to measure the difference between clean and greased posts when I charge the car battery, (low current).
My hypothesis is that dielectric grease does not add resistance. I expect that when contacts dripping with gobs of grease come together, the grease will be squeezed out of the space between the conductors, and whatever residue that remains between the contacts will not interfere with the current. But I want to test my hypothesis experimentally.
These are the materials I have available for the experiment: household items, ordinary garage tools, a cheap digital multimeter that I don't know how to use, wires with gator clips, copper wires of various size from magnet wire to 10 AWG.
Please describe a simple and safe experiment setup and make a prediction about what the outcome will be. Thanks.