If you made you spilled a milkshake and your dash or on the shifter console you want to clean it all up fast so it doesn't short on the electronic side but if you mean you have milkshake looking either coolant or engine oil then your head gasket is blown on the engine

Sounds like you have to replace the headgasket.

I really reccomend when you do the oil change, let your car drip over night, in the morning you will see all the contaminants that sit at the bottom of your engine or your transmission in your oil pan, and it does look like milkshake. do this for both and you will start noticing a difference in driving, everyone should do it. i even use a magnet for my engine oil filter wich stick to at the bottom of the oil filter to TRAP all the metal contaminants from going back to the engine, this results in a more cleaner engine. i got mines from ebay, I use alot of tape just to prevent the magnet from falling off.

Yep, that's a head gasket.