According to the Aircraft Owners and Pilot Association, there are a few fundamental maintenance costs that every owner must pay attention to such as fuel, oil, engine reserves/overhaul and landing fees. In an example from an AOPA article, Hypothetical Operating Cost Calculation, a pilot flying 100-hours per year vs. 300-hours per year can make a huge difference so it’s important to note that these calculations can vary based on travel schedule and the condition of the aircraft. Here is the breakdown of the fundamental maintenance and operating costs based upon 100-hours vs 300-hours: [links]