A little more information please
What model year and 6 cylinder engine size of Ford Ranger
According to the 1999 Ford Ranger Owner Guide : With engine oil filter change ( 4.5 quarts of engine oil ) for your 2.5 liter 4 cylinder
With engine oil filter change the 2.3 liter DOHC takes ( 4 quarts ) and the 2.5 liter 4 cylinder in a Ford Ranger takes ( 4.5 quarts )
According to the 1998 Ford Ranger Owner Guide : With engine oil filter change : The 2.5 liter four cylinder engine takes : ( 4.5 U.S. quarts of 5W-30 )
( 4 quarts ) with engine oil filter change for the 2.3 liter DOHC 4 cylinder engine in a 2005 Ford Ranger , according to the Owner Guide
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 )
According to the 2006 Ford Ranger Owner Guide : With engine oil filter change : The 2.3 liter four cylinder engine takes ( 4.0 quarts of 5W-20 engine oil )
On a 2005 Ford Ranger : With engine oil filter change : The 2.3 liter four cylinder engine ( takes 4.0 quarts ) The 3.0 liter V6 engine ( takes 4.5 quarts ) The 4.0 liter V6 engine ( takes 5.0 quarts )
For a 1999 Ford Ranger : With engine oil filter change : The 4.0 liter V6 engine takes ( 5 quarts ) The 3.0 liter V6 engine takes ( 4.5 quarts ) The 2.5 liter 4 cylinder engine takes ( 4.5 quarts ) According to the Owner Guide
That would depend on what year it is . The 2.3 liter DOHC version only takes ( with engine oil filter change / 4 quarts ) The SOHC takes ( with engine oil filter change / 4.5 quarts and some years take 5.0 quarts ) for the 2.3 liter 4 cylinder in a Ford Ranger
According to the 2009 Ford Ranger Owner Guide : With engine oil filter change : For the 2.3 liter four cylinder engine ( 4 quarts of 5W-20 ) For the 4.0 liter V6 engine ( 5 quarts of 5W-30 )
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 owners manual : ( WITH FILTER CHANGE ) 2.5 L four cylinder engine takes ( 4.5 quarts ) 3.0 L - V6 engine takes ( 4.5 quarts ) 4.0 L - V6 engine takes ( 5.0 quarts )