its a Ford Ranger motor, or it might be some other motor. And the FI stands for fuel injected.
According to the 2006 Ford Ranger Owner Guide : The 3.0 liter V6 takes ( 5W-20 ) The 4.0 liter V6 engine takes ( 5W-30 )
The 2.3 liter 4 cylinder and the 3.0 liter V6 engines use ( 5W-20 ) The 4.0 liter V6 engine uses ( 5W-30 ) according to the Owner Guide
For a 1998 Ford Ranger ( 5W-30 ) 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 of 5W-30 ) ----------------------------------------------------------------------------------------- The 4.0 liter V6 engine takes ( 5.0 U.S. quarts of 5W-30 )
For the 4.0 liter V6 , 5W-30 For the 4.6 liter V8 , 5W-20
( 5W-30 ) in your 2.0 liter four cylinder or your 2.5 liter V6 engine
5W-30 , is the preferred oil for the 4.0 liter V6 , according to the Owner Guide
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 )
For the 4.0 liter V6 ( 5 w 30 ) For the 4.6 liter V8 ( 5 w 20 )
5W-30 is the preferred oil in a 1996 Ford Explorer ( 4.0 liter V6 and 5.0 liter V8 )
Grand Prix: 2.8 Liter V6, Auto Transmission: 18 - 27 MPG 2.8 Liter V6, Manual Transmission: 16 - 27 MPG 3.1 Liter V6, Auto Transmission: 17 - 28 MPG I have the same year car with a 3.1 liter V6, I get about 29 - 30 mpg driving mostly on the freeway with cruise control.
The recommended engine oil type in most V6 3.1 liter is 5 W 30. This engine oil can be purchased at most auto parts stores.
According to the 1999 Ford Ranger Owner Guide ( 5W-30 ) 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 of 5W-30 ) The 4.0 liter V6 engine takes ( 5.0 U.S. quarts of 5W-30 )