hey thorwich i dont want to be condensinding, but you never know someones level of mechanics, but did u check ur oil level, is is cold there or hot you might be running the wrong viscosity of oil for the season, ie a high viscosity for winter will not flow well, as well pump might be going bad you can pick one up from rockauto.com for like 80$,
1)drop your oil pan and check the scavange pump screen for clogs,
2)ensure there isnt anything at the bottom of your pan my buddy had a piece of rag once from when he put it up between the crank and block to soak up oil and forgot to grab it.
3) if non of this is the issue you might have a clogged oil vein after the oil sending unit, you can blow air through the lines and if its clogged you should be able to head it only coming out the bottom ( bubbling in the oil, you have to take the vlave over off to see it push through the ports)
hope this guides you closer to an answer
