The preferred oil is 5 W - 30
A 1998 Ford Explorer uses refrigerant 134a
I have a Motorcraft ( BXT65 - 650 ) Fords top of the line battery for the 1998 Ford Explorer
5W-30 , certified for gasoline engines
Hydraulic.
Should be R-134a.
According to the 1998 Ford Explorer Owner Guide : With engine oil filter change : ( the 5.0 liter V8 engine takes 4.7 liters / 5.0 U.S. quarts of 5W-30 )
SAE 10w30
For the 4.0 liter V6 engine ( 5W-30 ) For the 4.6 liter V8 engine ( 5W-20 ) According to the 2004 Ford Explorer Owner Guide
The 2010 Ford Explorer Owner Guide shows : For the 4.0 liter V6 engine ( 5W-30 ) For the 4.6 liter V8 engine ( 5W-20 )
According to the 2005 Ford Explorer ( and Ford Explorer Sport Trac ) Owner Guides : For the 4.0 liter SOHC , V6 engine : ( 5.0 US. quarts / 4.7 liters of 5W-30 engine oil with the Motorcraft FL-820-S engine oil filter )
SAE 5 W 30 - certified for gasoline engines
A 1999 Ford Explorer Eddie Bauer has the 5R55E automatic transmission with the 4.0 liter SOHC , V6 engine , and the 4R70W automatic transmission with the 5.0 liter V8 engine