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In the Ford 2011 F-350 with a 6.2 engine, there have been reports of issues such as loose gaskets and oil leaks that can lead to various engine problems. Another common concern is a spark plug coming loose, which can also cause engine troubles. It's important to address any loose gaskets promptly by tightening them to prevent further complications. Engine overheating is a critical issue that should be avoided as it can result in car fires and even vehicle explosions. To maintain your engine's health, you should keep an eye out for excessive oil usage and change the oil promptly when needed. Additionally, it's recommended to replace the air filter every 15,000 to 30,000 miles, change the coolant every 60,000 miles, and swap out the spark plugs every 100,000 miles unless you have copper ones, in which case they should be replaced every 30,000 miles or so.
Although the 6.2-liter Ford F350 is known for its reliability as an engine and vehicle pairing, some users have raised concerns about the engine's fuel efficiency decreasing when towing heavy loads.