2001 Ford F-150 - Oil light

My 2001 F 150 does same thing as the previous 2000 f 150 complaint above, except the oil light comes on as well. Only while driving 20 min or so , turn truck off restart everything back to normal for about 20 min. Engine not overheating oil press gauge showing good oil press. oil level full.

There is no complaint above… only your post. So we don’t know what your problem is. Wanna fill us in?