to change oil or not????

[PatM]

A little back ground first
I have a 2000S Looks and runs great 57k miles live in the mountains of E TN.
We do have some cold weather usually a few days below 0* and some snow. I will not drive my Boxster in the snow!!!!
At the beginning of the driving season I changed the oil and filter. I have the upgrade to the spin on type filter and use the Nappa Gold as recommended...Also I use Mobile 1 0 40
I have only put 1400 miles on this oil and filter..
With winter coming trying to decide if I should change or not. If it is a mild winter I may be able to drive it several times a month or more. Maybe not????? It may set for several months ????
Pedro convinced me that oil becomes acidic with numerous heat ups and cool downs.
I have the new oil and filter just have to wait for warm enough weather to change it.
I am leaning toward changing it.
I'm interested in opinions from some of the oil experts, and others.
Thanks for your input
Pat M
2000S speed yellow