GM-GMC: engine oit, oil change interval, chev silverado

Question
I have a 99 chev silverado, the engine idles erratically  during warm up and the oil had a smell of fuel so I got an oil change.  The temperature at my location is averaging minus 20 degrees, when I went to check the oil one morning before start up there was frozen water drops in the oil cap, what do you suppose would cause that? How would I prevent this from happening again?

Answer
It is normal for an engine to have condensation inside it.  It is the job of the PCV system to allow it to exit the crank case and it is usually routed to the intake to be combusted.  Its not uncommon for water vapour to accumulate, it's not ideal, but its not uncommon.  Short trips and  cold ambient temperatures are particularily bad for accumulating condensation and excess fuel in your oil.  To prevent it from happening try to eliminate short trips as much as possible, check your pcv system and make sure it is functioning and try to get out on a longer drive, 26km at cruise speeds is a length I have heard before, to allow the pcv system enough time to function properly.  You can also switch to a 'severe service' oil change interval which is around every 3000km or so.
Hope this helps.
Oh ya you could move to florida too.