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My oil is still registering only on the low side on the dipstick, so it couldn't have been more than a quart or two. I went from my house to the church, to my parents, and back to my house, total of two miles round trip. I went back and checked, nothing on the ground at the church. A little on the ground at my folks place, and more at my house when I arrived home.
I put in a new t-stat a few months ago, wish I'd have kept the old one now... I'm going to flush as much as possible. I really hope I don't have to add a water pump to this job...
Flush it good like Benny said. Dump some simple green in it after with water and let it circulate with no t-stat in. Then flush some more. The simple green will help loosen the oil out of the system. You can try to save it all.
If the water pump ends up pushing air after this it will cavitation will eat the front cover up. Then you have bigger problems. So flush, flush, flush...