CAn Amsoil Really Keep your Engine Clean? Here is our 2012 Ford Transit Connect equipped with a 2.0 four cylinder. Had to replaced the valve cover gasket and spark plug tube gasket. What better wat to find out if AMSOIL keeps your engine clean on 10k mile oil changes. Yes we do 10k miles. Alot of stop and go traffic. This is out little fleet beat around town truck. I recommend getting a used oil analysis done at 5k miles. Then that report will tell you if you can go further. For AMSOIL go here 00:00 intro 02:06 beginning of valve cover removal 11:47 Inside a engine using amsoil every 10k miles