According to the 1998 Mercury Sable Owner Guide ( 5W-30 )
With engine oil filter change :
The 3.0 liter " Vulcan " V6 engine takes ( 4.25 litres / 4.5 U.S. quarts of 5W-30 )
The 3.0 liter " Duratec " V6 engine takes ( 5.2 litres / 5.5 U.S. quarts of 5W-30 )
SAE 5w20
According to the 1999 Mercury Sable Owner Guide : ( 5W-30 )
According to the 1998 Mercury Sable Owner Guide : With engine oil filter change : The 3.0 liter " Vulcan " V6 engine takes ( 4.5 quarts ) The 3.0 liter " Duratec " V6 engine takes ( 5.5 quarts )
( 5W-30 ) is the preferred oil , according to the Owner Guide
SAE 5w20 any major brand.
For the 1998 Mercury Sable : With engine oil filter change : The 3.0 liter " Vulcan " V6 takes 4.25 liters ( 4.5 U.S. quarts ) The 3.0 liter " Duratec " V6 takes 5.2 liters ( 5.5 U.S. quarts )
5W-30 is the preferred engine oil , according to the Owner Guide
The 1995 Mercury Sable would have come from the factory with ( 5W-30 ) oil in the engines
5
According to the 1998 Mercury Sable Owner Guide : With engine oil filter change : The 3.0 litre " Vulcan " V6 engine takes ( 4.25 litres / 4.5 U.S. quarts of 5W-30 ) The 3.0 litre " Duratec " V6 engine takes ( 5.2 litres / 5.5 U.S. quarts of 5W-30 )
put some oil in it then!!
That really depends on what model year of Mercury Sable , and which engine you have A little more information please