I'm leaving the heads on the block. Despite my very best efforts I notice a small amount of dust has gotten under my engine covers and into the valve portion of the heads (not the cylinders, they're closed off). I'm intending to flip the engine upside down and eliminate any dust with WD-40 or appropriate surrogate but just want to be sure that's ok to mix with engine oil.
I'll be sure to change the engine oil within 200 miles once I get everything back running again but I keep learning the hard way that such seemingly innocuous decisions can have major consequences. Just trying to get ahead of such consequences by asking the questions on here.