How to can tomato sauce or spaghetti sauce

I've read a bunch of stuff on official canning sites and in canning books talking about NEVER include oil in your canning recepies.  Well, I've been canning my Aunt Mae's spaghetti sauce that uses oil and I still have not caused me or my family any digestive problems.  I just canned 14 quarts of beautiful spaghetti sauce that I use for lasagna, pasta, pizza sauce and more.  It's absolutely delicious!  I'll be posting the recipe shortly...