There's no single answer to how many quarts of oil a 4.2-liter engine holds. The oil capacity depends on the *specific* make, model, and year of the vehicle. A 4.2-liter engine from one manufacturer might require 4 quarts, while another might need 5 or even more.
You must consult your vehicle's owner's manual to determine the correct oil capacity. This information is crucial for proper engine lubrication and to avoid damaging your engine.
