According to the 1997 Ford E-150 owners manual :
With engine oil filter change :
The 4.2 liter V6 engine takes ( 6.0 U.S. quarts / 5.7 litres of engine oil )
8 qts
15 quarts of 15w-40
I believe that is 6 quarts ( 5.7 liters ) WITH ENGINE OIL FILTER CHANGE
15 Qts
In a 1997 Ford Econoline : With engine oil filter change : The 4.2 liter V6 , 4.6 liter and 5.4 liter V8 , 6.8 liter V10 gasoline engines take : ( 6.0 U.S. quarts of 5W-30 )
The power of the engine and the maximum speed of the 1975 Ford Econoline are 305 hp and 160 mph respectively.
The power of the engine and the maximum speed of the 1964 Ford Econoline are 140 hp and 90 mph respectively.
The power of the engine and the maximum speed of the 1970 Ford Econoline are 50 hp and 45 mph respectively.
Aprox $500 parts and labor.
You can tell the engine is blown when the Ford Service department manager refuses to admit there is anything wrong with your engine and flat out refuses to supply paid for warranty covered repairs!
Where is the engine oil cooler on a 1998 Ford Econoline van E150
A little more information please What model of Ford , what is the engine size