IdahoDoug said:You might also call Blackstone Labs who does the oil analysis for a few guys here. Ask them what, if anything, sending in a sample of the oil that's now in the engine would tell you/them.
DougM
Good idea. Run this new batch of oil up to operating temp and then sample as it drains, but wait until a quart or three drain before you catch the sample. You want to make sure the oil and "stuff" is well mixed in order to get a representative sample.
Blackstone can get you a sample bottle in a couple days.