Milk in valve covers

[FED 387]

if you are using Pennzoil it may happen seems some oil brands are prone to this too --we chased this for almost 3 months thought it was everything from leaky gaskets (head/intake) to condensation etc-- switched to Valvoline problem went away immediately --part of what we found is the condensation gets all whipped up in the oil and the result is that milky look--- so we started the engine ran it for a few minutes pulled the v covers and cleaned em with brake clean left the covers off for 10-15 min to let the stem evaporate and then reinstalled the v covers and went on our way---this only happened if ya only ran the car every so often if ya ran it every weekend did not seem to be a problem--we did install one of those plastic check valves from the v cover to the headers --valve is the vacuum takes about a 3/8inch ID hose the kind that went on a early 60s to mid 70s GM power brake booster seemed to help a lot too--just my experience--Comp 387