Hello everyone. I am confused. Went to change the only on my 86 Mondial today. Warmed up the engine for 10 to 15 minutes. Pulled plug and let drain for 15 minutes. Added about 7 1/2 quarts of oil and then checked. It appeared to be way over full. Removed drain plug and oil barely dribbled out. Looked like it was already drained. Checked dipstick again and doesn't appear that the level had changed. Still overfilled Where is the 7 1/2 quarts that I put in plus the oil that was in it. The oil that was initially drained was only about 4 1/2 quarts (?).