A lil while back I made a comment on a thread concerning a repair on a newer style E series engine....
I said Briggs had advertised a newer no change oil engine just add.... Some people just shook their head and almost called me a fool, wanting me to supply proof.....
A few others had heard of it also but couldn't find info.... Briggs did have a bulletin out on it and I couldn't find it. Well here it is in black and white and Red and black and white.....
www.briggsandstratton.com/na/en_us/innovations/push-mowers/just-check-and-add-technology.html