For the 2.3 liter and 3.0 liter engines ( 5W-20 )
For the 4.0 liter SOHC , V6 engine ( 5W-30 )
According to the 2005 Ford Ranger Owner Guide
Take your 2002 Ford Ranger to the garage to get the engine checked.
I would need to know what size engine you have and what year of Ford Ranger in order to answer your question
a 1993 ford ranger will hold 5 qts of oil. From the Chilton Ford Ranger guide: A 1993 Ranger with a 3.0 liter engine take 4.5 quarts of oil. The other engine sizes all take 5.0. My 3.0 Ranger takes 5 quarts, Chilton is probably not taking into account of the oil filter.
According to the 2005 Ford Ranger Owner Guide : With engine oil filter change : The 2.3 litre four cylinder engine takes ( 4.0 U.S. quarts of 5W-20 ) The 3.0 litre V6 engine takes ( 4.5 U.S. quarts of 5W-20 ) The 4.0 litre V6 engine takes ( 5.0 U.S. quarts of 5W-30 )
5W-30
According to the 2008 Ford Ranger Owner Guide : For the 3.0 litre V6 engine : With engine oil filter change : ( 4.5 U.S. quarts of 5W-20 engine oil )
According to the 2002 Ford Ranger Owner Guide : For the 2.3 liter four cylinder engine and the 3.0 liter V6 engine ( 5W-20 ) For the 4.0 liter V6 engine ( 5W-30 )
With engine oil filter change ( 5 quarts of engine oil )
According to the 1997 Ford Ranger Owner Guide : With engine oil filter change : The 2.3 litre four cylinder engine takes ( 5.0 U.S. quarts of 5W-30 )
The 2008 Ford Ranger owners manual shows ( 5 quarts ) of engine oil ( 5 W - 30 ) WITH FILTER CHANGE
According to the 1999 Ford Ranger Owner Guide : With engine oil filter change : The 2.5 liter four cylinder engine and the 3.0 liter V6 engine take ( 4.5 U.S. quarts ) The 4.0 liter V6 engine takes ( 5.0 U.S. quarts )
According to the 1998 Ford Ranger Owner Guide : With engine oil filter change : The 2.5 liter four cylinder engine takes ( 4.3 litres / 4.5 U.S. quarts of engine oil )