For its 2015 models, Lincoln suggests that customers use American Petroleum Institute-certified oil with a viscosity grade of 5W-30 for its four-cylinder 2-liter, four-cylinder 2.3-liter and six-cylinder 3.5-liter ecoboost engines. Lincoln suggests that customers use Motorcraft brand oil that is either fully synthetic or a synthetic blend.
For its older models using its eight-cylinder 4.6-liter engine, including the 2010 Town Car, Lincoln recommends that customers use 5W-20 viscosity oil, also API-certified and Motorcraft branded. This oil can be either synthetic, synthetic blend or traditional. These same oil suggestions also apply to Lincoln's six-cylinder 3.5-liter engine used in models such as the 2010 MKX.