Most likely R-134. Just check your fittings. The R-12 fittings won't accept R-134 connection hoses and vice versa. R-12 are screw on schrader type while R-134 are larger.
SAE 5w20 any major brand.
Regular unleaded , 87 octane
Right where the transmission dipstick goes. You will need a funnel
According to the 1999 Mercury Sable Owner Guide : It came from the factory with a 50 / 50 mix of distilled water and GREEN color antifreeze ( meeting Ford specification ESE-M97B44-A )
Carol Sable goes by Sable.
You have to take it to a shop to have the computer resetAnswerMost likely it's either the door ajar alarm or the seatbelt alarm.
According to the 1999 Mercury Sable Owner Guide : With engine oil filter change : The 3.0 liter Duratec ( DOHC ) V6 engine takes : ( 5.5 U.S. quarts of 5W-30 )
According to the 1999 Mercury Sable Owner Guide : For the 3.0 litre , DOHC , " Duratec " V6 engine : With engine oil filter change : ( 5.5 U.S. quarts of 5W-30 engine oil )
1994 - 12.25 qts.See "Related Questions" below about transmission fluid capacity
Check under where the brake fluid goes its hard to get too and you will need a long spouted funnel
If you are referring to the electric engine radiator fan, there should a safety recall for a free replacement or repair. I had one done on my 1995 Mercury Sable. But I don't know if the recall goes back that far to 1988. Go to the Federal Government's National Highway Safety web page to see.
R134A