I found another secret I've got to share with the group. For guys with manuals or not using the transmission temp sender. Remove the test plug on the oil filter housing and then install the transmission temperature sender.    The secret found.   If you want to find out if your over advancing timing its is super simple. Measure the engine oil temperature. When I started I was roughly +10°F over the coolant temperature. I was starting to test MPG in different RPM ranges. Found