According to the 1999 Ford E-150 Owner Guide :
( 5W-30 is used in ALL the GASOLINE engines )
With engine oil filter change :
( 6.0 U.S. quarts / 5.7 litres of 5W-30 ) for the 4.2 V6 / 4.6 + 5.4 V8's / 6.8
V10
use straight 30 weight detergent
10W30
5w30
5w30 is recommended.
The oil capacity of a 99 Ford Escort is 4 quarts. Use 5W-30 weight oil. Use a SM rated oil which is the highest rating.
Acetevo 10W-40
5w30
5w30 or 10w30
5w30
It is important to use the right fluids in a vehicle to keep it running. The 1999 XR 600r uses engine oil 15/40 weight.
If you mean 5w20 synthetic the answer is NO. Pontiac recommends SAE 10w30 weight oil in Synthetic or Conventional. Use exactly that weight.
75w9075w90