1995 Dodge Ram V8 Problem

Dodge problem...Please Help!!
In the family we have a 1995 Dodge Ram V8 2500
Magnum that just started acting strange. After sitting stuck for most of the winter it has been driven daily since beginning of March...not having one single problem. Just the other day on her way to work in the Dodge, my daughter called me and the truck was loosing power while accellerating. It made it there and a friend looked at it and noticed that the oil seemed low and added 2 quarts and all of a sudden it was full. Oil has been checked and added if needed in the time it has been driven. On the way home from work the truck did fine at a high speed on the highway, but when got into town and slowed down it stalled and the oil light came on. It did start again and she made it home, but it won't start and stay started now.

Does anyone have any ideas what might be going on with this truck?

Is this some sort of O2 sensor problem, fuel injector problem or even electrical?

Please help, we would really appreciate any ideas!

I have had the oil drain holes in the head plug up. Use a small screwdriver and clean them out run then change oil and filter. Dodge has used a plastic gear on the distributor that drives the oil pump. Make sure you have good oil pressure. Fix this problem first before you lose the engine.