10W-30 for non turbo. 5W-30 for turbo models
its located in the oil pan...
10w30
5W30 weight is factory specs.
5w30 or 10w30
5w30 ONLY.
( 5W-30 ) is the preferred oil , according to the 1997 Ford Ranger Owner Guide
10w30
I have always found that 20w50, the heavy weight oil, works best in older vehicles.
5w30 or 10w30
You need 4 quarter or 1 gallon of oil, no more.
SM rated 5W-30 weight of oil.
SAE 20w50 100% synthetic oil.