UV oil dye to test internal oil leak?
 

Got a s5 t2 running after sitting for 10 years. Put about 3oz of marvel mystery oil in to free up the seals prior to hand cranking then eventually by starter. Engine fires up no problem. Testing the engine and used a block tester (fluid) to check for blown coolant seals and it passed.

Probably have about 45 minutes of engine run time since it sat for 10 years. A small amount of blue smoke is still coming out the exhaust (oil).

is it possible to put UV oil dye into the crankcase oil and see if I see it in the exhaust? I’m betting the answer is no especially since it’s on stock ECU with the OMP running.

Guessing the best thing to try is letting it run for a few hours?