The oil on the engine oil dipstick is foamy after a drive when it sits for awhile the oil looks perfect?

Any white foam on the cap indicates water in the oil. Mild white foaming may just be that the car is not warming up properly or its just cold and damp weather and the oil cap is not giving a good seal - can be caused by too many short journeys. Foaming around the dipstick is likely to be more indicative of internal leaking around the head gasket or maybe water in the engine bay from jet washing as a temporary thing. Keep an eye on it an wipe clean to see if it clears up and take the car for a drive in excess of 6 miles or more to warm up properly. Extra indicators like overheating whilst stationary and a rancid smell accompany head gasket failure. Also worth checking the expansion tank as if water is moving into the oil, oil will also move into the water and create a rainbow on the water which is definitely head gasket problems. Poor performance of the vehicle and stalling is also a result of head gasket failure but depends how and where it is leaking.

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