Beginning with 2001 models, most Ford and Honda vehicles came factory-filled with a 5W-20 grade of motor oil. In addition, owner's manuals specify the continued use of this new viscosity grade. Ford owner's manuals state in bold letters, "SAE 5W-20 oil provides optimum fuel economy and durability performance meeting all requirements for your vehicle's engine.
According to Mike Riley, product design engineer with Ford Motor Company, "Moving to 5W-20 was driven by using best technology oils, CAFE requirements and customer needs." The company believes the switch to lighte viscosity 5W-20 oils will reduce carbon dioxide emissions by 190,000 metric tons a year and reduce U.S. fuel consumption by over 21 million gallons a year.
In order to ensure lighter viscosity 5W-20 oils don't sacrifice engine durability, Ford ran extensive field tests comparing 5W-20 and 5W-30 oils and used the data to create their own oil specification known as WSS-M2C153-H, which includes all ILSAC (GF-3) requirements, as well as a longer ASTM Sequence III Test.
Blended to surpass both GF-3 and Ford specifications, AMSOIL 5W-20 offers superior engine protection and unsurpassed fuel economy in engines calling for a 5W-20 oil.
Although blended to meet the requirements of 2002 Ford and Honda vehicles, AMSOIL 5W-20 may also be used to improve fuel efficiency in certain older Ford and Honda models. Manufacturers are reviewing which older vehicles they will recommend 5W-20 motor oils be used in.