How could you find out if cooking oil reduces friction more than water?

To determine if cooking oil reduces friction more than water, you could conduct an experiment using a flat surface and two identical objects with a consistent weight. Apply both cooking oil and water separately to the surface and measure the force required to move the objects across each fluid using a force gauge. Comparing the measurements will reveal which substance reduces friction more effectively. Additionally, repeating the experiment multiple times can help ensure the results are reliable.