RE: 2.5 question in cold
I say this for the "good of the publics' engines'".
When its COLD, your engine NEEDS TO BE RICHENED!!
Yes, the cold air takes away SOME of the heat but cold air is pretty dense, and you need additional fuel to meet your air/fuel ratio.
If you were running for a while, you can expect a MAXIMUM of a teaspoon to collect. when you shift speeds, turn etc, most of the oil will come out. Make sure your fuel lines arent punctured! This is very had to see and it can cause tuning nightmares.
Sleep tight!
Ram