I did a bit of googling and cam up with this site
http://www.chris-longhurst.com/carbibles/engineoil_bible.htmlAccording to this guy it indicates a blown head gasket. The site talks extensively about oil for cars and the blown head gasket comment is because coolant is getting into the oil and then mixing. Since snowblowers work in a somewhat wetter environment I have a hunch it doesn't indicate a gasket problem, just that you have water in the oil. I haven't found anything to indicate what to do about it. Certainly replacing the oil and then being careful when you check the oil level.is the most conservative solution.
This needs to be taken with a grain of salt so to speak. If you have an abundant amount of white foamy gunk in your oil then in the case of a water cooled engine, it well could indicate a blown or leaking head gasket, resulting in leaking coolant into the oil.
on a small air cooled 1 or two cylinder engine though, not likely, and its just as likely on the small engine, it wouldnt even run with a blown head gasket, due to lack of compression.
Whats actually happening is the engine warms to normal operating temp. then when its shut down and stored in a cold temp. moisture forms inside the engine (just like it does on a glass of cold or iced liquid on a hot summer day) and gravity being what it is, the condensation drains to the lowest place possible, usually the oil pan.
its perfectly normal to see a little white oil water mix around breather caps and even on the dipstick or in the oil itself when drained, when dealing with temp. changes the blower (and other engines) are subjected to in winter weather, where your dealing with around a 160 degree temp. change (or more) from actual air temp. to normal engine operating temp.
The reason you dont see it as often in auto engines is they usually run for longer periods of time which will for the most part evaporate the water thats created from condensation inside the block. Ive seen condensation streaks, (the white foamy stuff) in many autos & other engines from time to time through the years with no ill effects, in fact one of my farm tractors has been subject to this in weather where there are some more extreme temp changes we see some parts of the year. At over 6000 hours, which would be in excess of 200000 miles based on an (average speed of 40 mph which would be reasonable for an automobile with this number of hours,) and the majority of it under working load, if it were to be coolant leaking into the oil, or merely problems caused by the condensation, after this many hours would of been cause for major engine repairs.
Bottom line, though some engines seem to be more prone to seeing condensation issues than others, its pretty much normal for it to happen in winter weather. keep an eye on it, and change the oil as recommended & there should be no problems arise from it.
