What is your opinion on stashing motor oil? I know many of you participate in this pass time. I'm wondering if I should stash a few oil changes worth of oil. With the ever increasing cost of crude oil, it might make economic sense. I was thinking maybe 20qts of TropArtic WM ($1.48) and 10 to 15qts of GC Gold or Green AZ($5.99), this would equal about 7 oil changes on my 95 Ford Explorer. That is enough to last me around 3-4 years, at 10-15k a year. Any suggestions for me?