If the check engine light comes on it is best to take it to a auto part store or mechanic for a diagnosis. They will be able to inform the owner what the issues is.
The Ford Taurus.
Depends which engine you have. There are a few ways to do it without the special tool. But it involves really knowing how to time an engine. Best way is to buy the tool.
I was looking at the 2011 Ford Taurus Owner Guide and it shows that the SHO engine is designed to run on regular unleaded , 87 octane or higher but for best performance use premium unleaded , 91 octane or higher
According to the 2003 - Ford F-150 - SVT supplement : " premium " unleaded 91 octane or higher for best performance for your super charged engine
According to the 2011 Ford Taurus Owner Guide : The 3.5 liter V6 engine will run normally on ( " regular " unleaded , 87 octane , " premium " unleaded will provide improved performance ) The 3.5 liter Taurus SHO engine ( I believe that has twin turbochargers ) uses " regular " unleaded , 87 octane or higher ( 91 octane or higher recommended for best overall performance )
2003 was the last year for the 7.3 Diesel. Best diesel engine ford ever put out.
Any SAE certified antifreeze can be used in your 1997 Ford Taurus. The automaker recommends that you use an anti-freeze that is rated for -35 degrees.
A salvage yard will probably be the best place. The last place for me would be the dealer.
if under warranty its best to use manuf spec
Not eveyone is going to agree about the best engine, but I believe the Ford Powerstroke is the all time best engine around.
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.