The Owners Manual specifies an octane rating of 87, aka "regular" gas.
87
For a 1998 Ford Taurus : ( 16 U.S. gallons ) according to the Owner Guide
87 octane regular if it is a gasoline engine. Diesel fuel if it has a diesel engine.
On a 2006 Ford E-250 : The GASOLINE engines take ( " regular " unleaded , 87 octane )
For a 2000 Ford Explorer Sport : ( " regular " unleaded gasoline , 87 octane )
According to the 2003 Ford Expedition Owner Guide : For the 4.6 and 5.4 litre V8 engines : ( " regular " unleaded gasoline , 87 octane )
The best fuel for a 2000 Ford Taurus is 93 octane. You should avoid buying gas made in South America, as it contains sulpher which would not only smell terrible when it runs, but will also clog the fuel filters.
According to the 2003 Ford Taurus Owner Guide : If you have the Flex Fuel Vehicle ( FFV version of the " Vulcan " V6 engine ) Identified with a label inside the fuel filler door and also the 8th " character " of the VIN will be a " K " You can run " regular " unleaded gasoline , 87 octane or E-85 ethanol , or any combination of the 2 fuels ----------------------------------------------------------------------------------------------------- The other 2 available engines use " regular " unleaded gasoline , 87 octane
According to the 2003 Ford Windstar Owner Guide : ( No ) use " regular " unleaded gasoline , 87 octane
On a 2012 Ford Taurus : It has Fords " Easy Fuel " system ( so it has no gas cap ) its self sealing Open the fuel filler door and insert the gasoline pump nozzle
Fuel for gasoline engines which posesses a low octane rating using the R+M/2 method.
According to the 2000 Ford Expedition Owner Guide For the 4.6 and 5.4 ( " regular " unleaded gasoline , 87 octane )