According to the 1999 Ford Explorer Owner Guide :
With engine oil filter change :
The 5.0 liter V8 engine takes ( 5.0 U.S. quarts of 5W-30 )
Oil capacity for your 1999 Saturn DOHC 4-cylinder motor is 4 Quarts of oil
The smallest engine in a 1999 Ford Explorer is the 4.0 liter V6
6 quarts for 6 cylinder. 5 quarts for 4 cylinder.
4 cylinder holds 5 quarts 6 cylinder holds 6 quarts
Four cylinder needs five quarts, six cylinder needs six quarts.
5 quarts with engine oil filter change
5 quarts for a 1999 Toyota Tacoma 4 cylinder.
According to the 1999 Ford Explorer Owner Guide : With engine oil filter change : ( 4.7 litres / 5.0 U.S. quarts of 5W-30 ) * for the 4.0 litre SOHC V6 and the 5.0 V8 engines
4.5 quarts for the 4-cylinder model (including new filter)4.6 quarts for the 6-cylinder model (including new filter)
It holds 5.1 quarts.
5 w 30 , according to the 1999 Ford Explorer owners manual
4.5 quarts