Late Model Flathead Blow By

[guy1unico]

My late model flathead just started having blow by out the passenger side tailpipe. The moter was totally rebuilt about 4 years ago. I don’t drive it but to Burger stop 10 miles and sometimes to my office 30 miles. What do you think, should I be concerned? Is there an additive I can put in the oil (Royal Purple) or fuel that might help or do I just need to driver it more?

Thank you

Guy