What are the possibilities of problems when the oil is high and milky. The car has set for 6 months and nothing was wrong when it was parked. 2006 Nissan Altima

You likely have a blown head gasket or a cracked block. It sounds like it may have frozen over the winter and cracked the block..

">

I second the Blown head gasket..try starting the car with the radiator cap off and see if you get bubbles in your radiator/overflow bottle if so your getting pressure from combustion chamber into your cooling system. also when you start the car are you getting white smoke from the exhaust.? If so its definitely a sign your getting coolant into the combustion chamber n burning it threw the exhaust..

Thanks guys. The car was in a garage all this time plus we live in the south so I doubt it froze. The block could have been cracked when we bought it. It’s just odd that everything was good when it was parked. Hasn’t been cranked but yet the oil looks like it has water in it. I was hoping an injector was stuck and the fluid was gas but would it be brown? It smells like gas.

I would check your PCV system first, it removes moisture from the crankcase, and moisture is a contaminant for oil. Following that there are a few tests you will want to run to determine if water is getting into the oil from the cooling system. One is a cooling system pressure test, it will find internal and external coolant leaks, it takes some expertise to pin down a leak as it can come from radiator, hoses, heater core, water pump, or cracks in the water jacket. Second is a compression test, this will test the combustion chamber and head gasket for any leaks. Third is testing either the oil or coolant for contamination. Block Tester will alert you to combustion hydrocarbons in the coolant, an indication of a blown head gasket. You can also have the oil tested, it will tell you if it is contaminated with pure water (condensate) a sign of a failed PCV system, or with coolant due to a failed head gasket or crack in the water jacket.

Thank you for the help. Maybe things aren’t as bad as they seem.

Yea it would DEFINITELY be noticeable if you had gas in your oil..I would perform the test the other user recommended n let us know what results you get and we can go from there. Also have you tried running the car with radiator cap off to See if your getting bubbles or not or have you checked underside of oil cap for white residue.? If there is then start the car let it run and see if it evaporates if it does then more likely it's water from pcv and not antifreeze from head gasket leak, unless you filled your coolant system with water then that would be a pointless test..Good luck