White milky stuff on my car?

I have a 1997 Honda Civic and recently I found white milky stuff on the oil dipstick and engine cap and I know it's not the coolant because my car hasn't had coolant for awhile. I don't know what to do or why it's happening.

It is normal in a cold climate to see milky condensation on the cap and the top of the dipstick.

It is coolant. That is the perfect description of it mixing with oil. The only place they can mix is in the head gasket if it is leaking.

What do you mean the car has not had coolant in a while? That is supposed to be changed around every 6 months if it is the standard green stuff. Or else it becomes acidic and eats away at the head gasket, water pump, radiator, heater core.

If you thermostat is failed or you drive short trips often the engine may not evaporate it off. IF ii is in the oil
the classic head gasket failure which Civic's are famous for.

It is a mix of oil and water. Not good. Get the oil changed now, and why don't you have any coolant?

That can be condensation build up. Check the PCV value and PCV hoses.
Replace the oil cap or gasket so it seals up better.
Clean it up, change the oil then check it in a few weeks.

Old Honda's are famous for their head gasket failures, do a compression test but that is classic coolant and oil mixing.

Nuts, it is coolant.

Something mixed with the oil, probably water. And it can lead to some expensive repairs. I would try and sell the car to get rid of it and just tell whoever buys that it needs a tune up