2004 Chev Cavalier has a milk shake look to the dip stick on the oil. I just had the oil changed but they said I have a leaking oil gasket. How long will it last if I keep cooling and oil in the car? The oil is not mixing with the cooling the colling is mixing with the oil. I get dischange from my bankrputcy on May 7th I just need it until then. To get a new car. I have about 8 weeks to go and I drive about 5 miles a day 5 days a week. Please help is there anything I can do to make the car last 8 weeks only.

"Leaking oil gasket" I believe you have a leaking head gasket or a cracked head. Does it overheat or use up coolant? Water in the oil looks like a milkshake. For the short distance you drive, I'd try some type of leak sealer.

Many years ago I had a foamy substance form in the oil filler opening and I believe-under the valve cover. My problem was a clogged pcv valve. That was when emssion controls were pretty basic-nowadays I probably couldn't find the pcv (if there still is one). If I were going to try to make it last 8 weeks, I think that I would change the oil a few times during that time to get as much lubrication as possible.

I have seen it look more like Pudding, than a milkshake before and would believe it in the "pudding state", and I believe it will not pump.

NO never I have had the car for 4 years and I never had to add the cooling stuff ( red stuff in the cooling tank) and even now it never runs out. It may get above the middle line. But it goes right back down.

Also the car had gone the whole winter without a oil change I had let a family member use it and she had not changed the oil since July 2010 I got the car back March 2011 and it only had 2 qts in it. And I immentaly changed the oil. And that's when the guys seen the white slimmy creamy stuff on the dip stick. Which I had send before when I went a whole summer without chanign the oil and the guy said it was slug or something.. I don't know

Sorry to hear.
A good mechanic could determine if this is salvageable or not.