Check the owners manual for the required service on the engine. One big problem is the heat and the plug wires. I would replace them with a premium set of wires as the OEMs do not hold up long term. Change the plugs based on the owners manual.
Change the filters and fluids.
Ken
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Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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