Waiting for my results from my latest oil change. After running Supertech Syn for 15K miles, Rotella T5 for 17.5K miles I decided to run my 2009 Focus 2.0 5-speed for 22K miles with T6 15w-40. I commute now 100 miles round trip to work so I really turn up the miles. I am very interested to see what the lab says especially the TBN number. I put the T6 in on 12/4/19 and drained/sampled on 9/3/20 so I got a good run in the cool, cold, warm and hot parts of the year. I only had to add about half a quart the entire run and ran a Fram XG3600 filter. The manual specs a 3614 but I have the clearance under the engine to run the longer 3600 that doubles the filter capacity. Anyone wanna take a guess what the TBN might be?