The 2014 Mercedes GL450 has an oil type specified by the manufacturer as 0w-40 motor oil. This is the best oil to use because it will allow the SUV to run and perform its best with great efficiency. When You are refilling the oil after an oil change it will require about 9 quarts of oil with a new filter but always check the oil level after refilling to make sure it is enough. The recommended oil brand from Mercedes is Castrol EDGE European Formula Engine Oil 0w-40. You can use other brands but this is one of the better brands with great quality and additives that will help the engine run efficiently and keep it lubricated during extended driving hours..
Lloyd I
July 16, 2020
A 2014 mercedes gl450 will run it's best on 0w-40 motor oil.
The Questions and Answers on this page are the statements and opinions of their respective authors and not VehicleHistory.com. VehicleHistory.com
does not research or authenticate any of the Answers provided.