I have a '91 Porsche 911 that spends most of its life in storage. Have used Mobil 1 since new, and would like thoughts about oil/filter change frequency. Have only put on 190 miles since last change 14 months ago. Should I really be changing oil every X months regardless of mileage?

Respectfully, I am going to close this thread as this very same question already has been addressed in the other 2 identical posts you have made. :)

Any further discussion on this subject can be placed here:

http://www.automotiveforums.com/vbulletin/showthread.php?t=204845&page=2