My car does that. Milky on the dip stick in the cooler months. Summer its fine. When it first happend I thought I had a problem. Changed the oil 4 times in 1 weekend & it made no difference. Checked everything. No collant loss so came to the conclusion it was condensation. No water was in the drain pan, just on the dipstick. Pulled the valve cover and very slight milkyness around oil fill cap. Rest was golden & clear. Have run it two years now like that. As long as you have good oil psi, no coolant loss or mix in radiator, & plugs look ok I say run it.