Another oil question

I use full synthetic Amsoil and change it once a year.

Full synthetic here, change twice a year no matter of mileage. New Oil in the bottles is fine. I got a great deal on some full synthetic oil and had several cases in storage for years. No problems.

Typically, you only get additive-flocing in oils that are both very high-viscosity (such as gear oil), and/or that have large amounts of additives in them. Usually it takes a few years for this to happen, though. And if you agitate those oils periodically, you can help prevent separation.

Other than precipitation, so long as it's kept in a sealed-container, and has no outside contamination (including air), oil is like water: it has no "shelf life".

Mobile 1 full synthetic once a year. Only drive about 1,500 miles/yr

Changed oil/filter today, at 3,198 mi. used 5 qts. of Motorcraft that I had may change to full synthetic next. About 5 qts. if the dip stick reads full thats good enough for me. I drove it today to get things warmed up it was a very nice day here, clear and warm for Jan. forecast said 65 deg. It sure was fun to get out and drive it again.
Thanks for the responses Ron

i change mine every 4k or 4 months whatevers first. i use 6 qt of mobile 1. i like to keep it fresh even if im under on miles because of hte moisture accumulating and its cheep insurance