With recommended oil change intervals increasing from the old-faithful 3,000 miles and getting closer to 7,000, you could be adding 6 or 7 quarts of oil between services. Say your engine has a 5 ...

If you're looking to change the oil for one of these yourself, you should know that the 3.5-liter EcoBoost V6 engine takes six quarts of oil, and Ford recommends using 5W-30 synthetic blend oil.

According to page number 371 of the owner's manual, the dual-throttle-body V8 requires Motorcraft SAE 5W-30 engine oil to the tune of 10 quarts. In metric, that would be 9.5 liters.