Which Way?

[SwampCatRuss]

Just did the dreaded intake manifold replace. Question is. Do I drain the oil B4 I start it to check for leaks? Or, start it ,mix everything up, check for leaks,then change oil. Which will get the most crap out sooner? Then I will run fresh oil through, drain that. Then finally put GOOD oil in.

[Mike G]

I would drain whats in there now, it reduces your chance of damage due to contamination with crap/coolant. Replace with lesser price oil. Once you are satisfied with your work, replace that oil with the good stuff.

--Mike